i saw in a vid where someone gave another guy a kevlar vest as a buff, what is this and who can do it?
Which video, to my knowledge this ability was only available as a passive buff that engineers and soldiers could put on themselves, but If a person did really give a vest to someone else it would decrease the amount of damage they take.
Slightly Off Topic: I've seen quite a bit misinformation in this thread one that bothered me was the post about wallrunning, you CANT wallrun only wallhop.
Edit: The strategy guide officially comes out May 10th like the game, but If you know a store employee you can go and purchase a copy of Brink and the strategy guide right out of the warehouse, which strictly speaking isn't legal.