Trackstanding
I don't want to talk to you to interrupt your concentration, but I wouldn't mind giving you a gentle push to see what happens: would you be able to compensate? Were I to give in to this (theoretical, remember!) urge, I would be charged with assault. I feel the laws should be changed to allow for the satiation of normal curiosity. Anyway, if you're wearing a helmet, you should be OK.
I pushed my friend while he was trackstanding... pretty hard so he'd have to put a foot down. That SOB just sat there trackstanding and grinned at me.