Didn't we have a thread about this or was this on another forum?

Anyhow try these:
- When shopping casually take stuff out of somebody else's cart and put it in yours.
- When shopping, look around for a family where you notice that the parent(s) is very strict with his/her/their kids and 'ride' your cart past them. the look on their faces will be priceless.
- When talking to somebody get just a little to close
- Rub your nipples when talking to somebody
- Walk around with a female friend and fall down at a certain moment, yell loudly "she hit/tripped/kicked me".