I had a 1982 Chevy Caprice Classic that was a hand me down from my older brother. He had put a cherry bomb glasspack muffler on the thing so it was loud as fuck. One of the funnier quirks about the car was that when the windshiled wipers were turned on, they wouldn't turn off unless the car were turned off. So in order to turn them off whilst driving, I would have to put the car in neutral, turn off the ignition, re-start the car and then shift back into drive.
My brother had also wired the reverse lights to come on whenever the brakes were pushed. I'm sure many a person was freaked out upon rolling up behind me at a stop light and seeing my reverse lights on. Sadly the cops were less than amused.
They never find it as funny as you do.