Not the dumbest thing i've ever done, but maybe one of the most embarassing...
I drive a Saturn that as a manual transmission. When the brakes get wet they get sticky and don't like to let go. About 10 minutes ago I got my car washed by a bunch of teenage girls in bikinis raising money at a local parking lot. When I went to leave, I accidnetly revved to like 3,500 RPMs. They probably thought I was trying to show off in my lame ass Saturn
I knew a couple of the girls too.