Presence Excersice

I've done something similar to this before, this whole playing with one's presence in a space. It's rather fascinating and rather easy to do if you know what people pay attention to. It allows one to separate from the situation at hand when things get tight or redirect attention from someone else. This really only works, though, on those not overly aware of their surroundings. Some people just take in everything and, while you attempt to command their attention, they will continue to include others in their focus as well.