-This can be used as speedhack. Try to change item before stairs - you will RUN upstairs/down.
-This can be used as wallhack. Just try to change item near some wall.
-There are no sounds of footsteps, when you change item. Players can run without sounds.
-My friend told me, that if you fall from roof in this animation, you will not damaged.
P.S. Sorry for my bad english. I hope, my report will be clear.
VER: stable 114557