Stab in the head with a standard house key. It would absolutely cane. Unfortunately I completely forgot to do that when some twat started on two of my friends.
If only I had remembered, I would have been able to jab him in the head and ribs... it would maybe even slice open some skin through to his skull.
Seriously, try getting a key and practise which way is best for you to hold it seeing what you could do with it. It's great for self defence and not illegal to carry around.
The only downside is that if anyone who attacks you is wearing a hood, that would protect them. I suppose you could randomly stab around the face painfully hard. Sorry for the images.
