If multiple toasts are created in quick succession, such as pressing submit when the incident isn't completely filled in, they get put into a stack and displayed in order. This means if I press submit 100 times it will toast "incident has not been completely filled in" 100 times for their full duration.
Possible solution I'll be looking into: http://stackoverflow.com/questions/12922516/how-to-prevent-multiple-toast-overlaps?lq=1