diff --git a/examples/example.js b/examples/example.js
index 54ba128..b5ef7fc 100644
--- a/examples/example.js
+++ b/examples/example.js
@@ -1,7 +1,7 @@
 "use strict";
 const { createBot } = require("mineflayer");
 const { createPlugin, goals } = require("../dist");
-const { GoalBlock, GoalLookAt, GoalPlaceBlock } = goals;
+const { GoalBlock, GoalLookAt, GoalPlaceBlock, GoalInvert } = goals;
 const { Vec3 } = require("vec3");
 const rl = require('readline')
 const { default: loader, EntityState, EPhysicsCtx, EntityPhysics } = require("@nxg-org/mineflayer-physics-util");
@@ -136,6 +136,7 @@ async function cmdHandler(username, msg) {
       if (!author) return bot.whisper(username, "failed to find player");
       const dist = parseInt(args[0]) || 1;
       const goal = GoalFollowEntity.fromEntity(author, dist, {neverfinish: true});
+      const goal1 = GoalInvert.fromDyn(goal);
       await bot.pathfinder.goto(goal);
       break;
     }
diff --git a/src/ThePathfinder.ts b/src/ThePathfinder.ts
index 7206076..b9d94b9 100644
--- a/src/ThePathfinder.ts
+++ b/src/ThePathfinder.ts
@@ -387,19 +387,20 @@ export class ThePathfinder {
         const ret = bounded(...args)
         if (ret) {
           void this.reset('goalUpdated')
-          this.bot.off(goal.eventKey, list1)
+          for (const key of goal._eventKeys) this.bot.off(key, list1)
         }
       }
 
-      this.bot.on(goal.eventKey, list1)
+      for (const key of goal._eventKeys) this.bot.on(key, list1)
+
       goal.cleanup = () => {
-        this.bot.off(goal.eventKey, list1)
+        for (const key of goal._eventKeys) this.bot.off(key, list1)
         delete goal.cleanup
       }
 
       cleanup = () => {
         old()
-        this.bot.off(goal.eventKey, list1)
+        for (const key of goal._eventKeys) this.bot.off(key, list1)
       }
     }
 
@@ -516,13 +517,12 @@ export class ThePathfinder {
             const bounded = refGoal.hasChanged.bind(refGoal)
             const listener = (...args: any[]): void => {
               if (this.userAborted || bounded(...args)) {
-                console.log('hi', bounded(...args), this.bot.listenerCount(refGoal.eventKey))
                 refGoal.update()
-                this.bot.off(refGoal.eventKey, listener)
+                for (const key of refGoal._eventKeys) this.bot.off(key, listener)
                 resolve()
               }
             }
-            this.bot.on(refGoal.eventKey, listener)
+            for (const key of refGoal._eventKeys) this.bot.on(key, listener)
           })
         }
       }
diff --git a/src/abstract/algorithms/astar.ts b/src/abstract/algorithms/astar.ts
index 820af8a..d46c223 100644
--- a/src/abstract/algorithms/astar.ts
+++ b/src/abstract/algorithms/astar.ts
@@ -36,7 +36,7 @@ export class AStar<Data extends PathData = PathData> implements Algorithm<Data>
     movements: MovementProvider<Data>,
     goal: Goal<Data>,
     timeout: number,
-    tickTimeout = 45,
+    tickTimeout = 40,
     searchRadius = -1,
     differential = 0
   ) {
diff --git a/src/mineflayer-specific/goals.ts b/src/mineflayer-specific/goals.ts
index 47d54ab..b24621d 100644
--- a/src/mineflayer-specific/goals.ts
+++ b/src/mineflayer-specific/goals.ts
@@ -19,14 +19,84 @@ export abstract class Goal implements AGoal<Move> {
   async onFinish (node: MovementExecutor): Promise<void> {}
 }
 
-export abstract class GoalDynamic<Key extends keyof BotEvents> extends Goal {
+type EasyKeys = keyof BotEvents | Array<keyof BotEvents>
+export abstract class GoalDynamic<
+  Change extends EasyKeys = Array<keyof BotEvents>,
+  Valid extends EasyKeys = Array<keyof BotEvents>,
+  ChKey extends Change extends keyof BotEvents ? [Change] : Change = Change extends keyof BotEvents ? [Change] : Change,
+  VlKey extends Valid extends keyof BotEvents ? [Valid] : Valid = Valid extends keyof BotEvents ? [Valid] : Valid
+> extends Goal {
   dynamic = true
   neverfinish = false
-  readonly abstract eventKey: Key
-  abstract hasChanged (...args: Parameters<BotEvents[Key]>): boolean
+  abstract readonly eventKeys: Readonly<Change>
+  abstract readonly validKeys: Readonly<Valid>
+  abstract hasChanged (...args: Parameters<BotEvents[ChKey[number]]>): boolean
+  abstract isValid (...args: Parameters<BotEvents[VlKey[number]]>): boolean
   abstract update (): void
   cleanup?: () => void // will be assigned later.
+
+  get _eventKeys (): ChKey {
+    if (this.eventKeys instanceof Array) return this.eventKeys as ChKey
+    return [this.eventKeys] as ChKey
+  }
+
+  get _validKeys (): VlKey {
+    if (this.validKeys instanceof Array) return this.validKeys as VlKey
+    return [this.validKeys] as VlKey
+  }
+}
+
+export class GoalInvert<Et extends EasyKeys = [], Val extends EasyKeys = []> extends GoalDynamic<Et, Val> {
+  eventKeys = [] as unknown as Et
+  validKeys = [] as unknown as Val // to be set later.
+
+  isDynamic = false
+
+  private constructor (private readonly goal: Goal) {
+    super()
+
+    if (goal instanceof GoalDynamic) {
+      this.eventKeys = goal._eventKeys
+      this.validKeys = goal._validKeys
+      this.isDynamic = true
+    }
+  }
+
+  static from (goal: Goal): GoalInvert {
+    return new GoalInvert(goal)
+  }
+
+  static fromDyn<
+    G extends GoalDynamic,
+    K0 extends EasyKeys = G extends GoalDynamic<infer K extends EasyKeys> ? K : never,
+    K1 extends EasyKeys = G extends GoalDynamic<any, infer V extends EasyKeys> ? V : never
+  >(goal: GoalDynamic<K0, K1>): GoalInvert<K0, K1> {
+    return new GoalInvert(goal)
+  }
+
+  isEnd (node: Move): boolean {
+    return !this.goal.isEnd(node)
+  }
+
+  heuristic (node: Move): number {
+    return -this.goal.heuristic(node)
+  }
+
+  hasChanged (...args: Parameters<BotEvents[keyof BotEvents]>): boolean {
+    if (!this.isDynamic) return false
+    return (this.goal as GoalDynamic).hasChanged(...args)
+  }
+
+  isValid (...args: Parameters<BotEvents[keyof BotEvents]>): boolean {
+    if (!this.isDynamic) return false
+    return (this.goal as GoalDynamic).isValid(...args)
+  }
+
+  update (): void {
+    if (this.goal instanceof GoalDynamic) this.goal.update()
+  }
 }
+
 /**
  * A goal to be directly at a specific coordinate.
  */
@@ -265,10 +335,11 @@ export class GoalPlaceBlock extends GoalLookAt {
 interface GoalFollowEntityOpts {
   neverfinish?: boolean
   dynamic?: boolean
-
 }
-export class GoalFollowEntity extends GoalDynamic<'entityMoved'> {
-  readonly eventKey = 'entityMoved' as const
+
+export class GoalFollowEntity extends GoalDynamic<'entityMoved', 'entityGone'> {
+  readonly eventKeys = 'entityMoved' as const
+  readonly validKeys = 'entityGone' as const
 
   public x: number
   public y: number
@@ -306,7 +377,7 @@ export class GoalFollowEntity extends GoalDynamic<'entityMoved'> {
   }
 
   hasChanged (e: Entity): boolean {
-    // if (e.position !== this.refVec) return false;
+    if (e.position !== this.refVec) return false
     const dx = this.x - this.refVec.x
     const dy = this.y - this.refVec.y
     const dz = this.z - this.refVec.z
@@ -319,6 +390,10 @@ export class GoalFollowEntity extends GoalDynamic<'entityMoved'> {
     return ret
   }
 
+  isValid (entity: Entity): boolean {
+    return entity.position === this.refVec
+  }
+
   update (): void {
     this.x = this.refVec.x
     this.y = this.refVec.y
diff --git a/src/mineflayer-specific/movements/movementProviders.ts b/src/mineflayer-specific/movements/movementProviders.ts
index 3cdbadd..42c911f 100644
--- a/src/mineflayer-specific/movements/movementProviders.ts
+++ b/src/mineflayer-specific/movements/movementProviders.ts
@@ -430,15 +430,29 @@ export class ParkourForward extends MovementProvider {
 
       // if (blockC.safe) cost += this.getNumEntitiesAt(blockC.position, 0, 0, 0) * this.entityCost
 
-      if (ceilingClear && blockB.safe && blockC.safe && blockD.physical) {
+      if ((ceilingClear || d === 2) && blockB.safe && blockC.safe && blockD.safe && floorCleared) {
+        const off = blockD.position
+        if (closed.has(`${off.x},${off.y},${off.z}`)) continue
+
+        // Down
+        const blockE = this.getBlockInfo(node, dx, -2, dz)
+        if (blockE.physical) {
+          // cost += this.exclusionStep(blockD)
+          // cost += this.getNumEntitiesAt(blockD.position, 0, 0, 0) * this.entityCost
+          neighbors.push(Move.fromPrevious(cost, blockD.position.offset(0.5, 0, 0.5), node, this))
+          // neighbors.push(new Move(blockD.position.x, blockD.position.y, blockD.position.z, node.remainingBlocks, cost, [], [], true))
+        }
+        floorCleared = floorCleared && !blockE.physical
+      } else if (ceilingClear && blockB.safe && blockC.safe && blockD.physical) {
         if (d === 5) continue
+        const cost1 = cost + 3 // potential slowdown (will fix later.)
         // cost += this.exclusionStep(blockB)
         // Forward
 
         const off = blockC.position
         if (closed.has(`${off.x},${off.y},${off.z}`)) continue
 
-        neighbors.push(Move.fromPrevious(cost, blockC.position.offset(0.5, 0, 0.5), node, this))
+        neighbors.push(Move.fromPrevious(cost1, blockC.position.offset(0.5, 0, 0.5), node, this))
         // neighbors.push(new Move(blockC.position.x, blockC.position.y, blockC.position.z, node.remainingBlocks, cost, [], [], true))
         break
       } else if (ceilingClear && blockA.safe && blockB.safe && blockC.physical) {
@@ -456,19 +470,6 @@ export class ParkourForward extends MovementProvider {
         // neighbors.push(new Move(blockB.position.x, blockB.position.y, blockB.position.z, node.remainingBlocks, cost, [], [], true))
         break
         // }
-      } else if ((ceilingClear || d === 2) && blockB.safe && blockC.safe && blockD.safe && floorCleared) {
-        const off = blockD.position
-        if (closed.has(`${off.x},${off.y},${off.z}`)) continue
-
-        // Down
-        const blockE = this.getBlockInfo(node, dx, -2, dz)
-        if (blockE.physical) {
-          // cost += this.exclusionStep(blockD)
-          // cost += this.getNumEntitiesAt(blockD.position, 0, 0, 0) * this.entityCost
-          neighbors.push(Move.fromPrevious(cost, blockD.position.offset(0.5, 0, 0.5), node, this))
-          // neighbors.push(new Move(blockD.position.x, blockD.position.y, blockD.position.z, node.remainingBlocks, cost, [], [], true))
-        }
-        floorCleared = floorCleared && !blockE.physical
       } else if (!blockB.safe || !blockC.safe) {
         break
       }