During a training crit, I brushed knuckles with the guy beside me. He recoiled like I had taken a kick at his dog. I didn't think it was a big deal, but I am new to this, so I suppose we could have been close to going down. Am I the guy other people will warn each other about before the next race?

How much contact is okay? None? Elbows/shoulder/hip okay, nothing near the bars? Enlighten me, please.