I'm sure a lot of people hearing about people dancing or using some other sort of gesture to go into 3rd person mode to be able to see around corners. Well here is proof that they do even more. Sure its not exactly practical, but I think all gestures should be removed during the actual match time of pvp. At the end of the video, it proves that by sitting down you can avoid the warlocks voidwalker grenade, simply by sitting down. Gesturing is completely useless during actual match play and obviously only creates advantages for everyone who exploits this system.