we play an extreme pub game which requires overt invasion of personal space..
it involves a lone player firstly striking up conversation with a seated group of strangers.. (not an easy task in itself in some areas of town)
once a rapport has been established the aim is to safely and swiftly and in one fluid movement, lift your T-shirt and place it over the nearest strangers head.. thus leaving them trapped between your sweaty chest and your T-shirt in a kind of alien/football celebration/pregnant human centipede scenario..
you then have to try to keep them there as long as possible while they struggle like a hooked fish and their mates frantically rush to their assistance..
points will be deducted for choosing an obviously weak or willing victim or for eliciting violent reactions (although for obvious reasons the latter is often the case)
the winner is whoever most recently attempted the challenge..
Zen masters of the discipline have been known to undertake solo missions alone in foreign parts for training purposes.. not a practise that I would recommend..