There are times when I forget that I have a convertible vehicle, and the back panel is off. One of those times was when I was stuck behind some brain-dead idiot who was parked in the middle of an intersection with the green light.
"GO, YOU FRICKING MORON! YOU HAVE THE RIGHT OF WAY! IT'S A GREEN LIGHT!"
I had forgotten that with all the windows down and the back panel off, people can hear me. As this guy's head jerking around proved.
Ah, well. Put the phone away next time, you fricking moron.