My friends never seem to have corkscrews, and I'm always popping in for a glass of wine.
Helpfully, I have a corkscrew with me, for such eventualities.
http://i45.tinypic.com/vwpysn.jpg
I don't think I would ever be attacked in Brighton. But, if I was, my assailant could ask a helpful passer-by to unscrew the corkscrew from his face while I continued on my way.
Obviously it was an accident. Bit of a struggle. He went for my bag. Corkscrew. Slip of the hand. Not sure how it happened, really.
Oh, glass of wine anyone, if I could have my corkscrew back, please?