Levitating down damage bug

using the levitation effect with an amplifier from 128 - 255 will effect the players falling speed. when in survival mode, and falling from a height enough height to deal damage, the player will take damage, and be shot up in the air.

here is a video. it is to large to attach to the bug report:
https://drive.google.com/file/d/0B0JpQiCxOW6tSGh3NDhheEpEZGs/view?usp=sharing