I remembered another thing I did once:
I was passenger in a car driving down Storrow Drive in Boston.
There were a TON of joggers out that day.
Each time we'd come up on some, I'd stick nearly half my body out the window and scream bloody murder, scaring the crap out of them.
Toward the end, we came up on this one dude, and I did the usual, but as we were passing, I saw the front of him and he was this HUGE, rugged dude with big cheekbones and massive pecs. So in the middle of my scream to scare him, I changed a couple octaves and was screaming in fear - he was that scary looking. He never flinched.
