Well, no great revelations here: body language is sorta important.
I'm a skinny dude, 1.80m, 65kg (5 10, 145lb?). Usually when streets are crowded or like today there's some street party with live music and whatnot, I'm very nice and step to the side and let people pass if they need to. When I don't, I usually get a bump and either a surprised "oh, sorry" or an angry stare. This doesn't happen to my buddy, who's about twice my weight and around 2.05 tall. People move quite quickly when he's around.
Anyway, I decided to conduct a wee little experiment (I just love these social interaction experiments

). Decided to carry myself in a slightly different way; hands outta pockets, stomach in (not that I have much of a tummy with my weight

), chest out and, most importantly, I raised my chin just a few centimeters above normal. Walked a bit more slowly too.
Lo and behold, people seemed to take it as a signal of aggression. And most moved for me and not vice versa. Even worked with big dudes, although I was careful not to assume the posture when I passed the Hells Angels groups and their entourage. I like to experiment, not get hurt.
At any rate, it has intrigued me enoughto make me more interested in just how I *do* carry myself around people. Unfortunately I've waded through tons of the poor quality huggy toejame "psychological" books on body language. Anyone got a reference for a good one?
It's sort of like tricking people, in a way: making use of unspoken tricks. Sure, people will pick up on anything consciously if they're looking and trying: but in most situations in life that ain't the case.
Additionally, anyone else got an experience with stuff like this? Would be cool to compare
