not quite what this thread is asking for, but several years ago I was riding with a friend of mine through the hood right after we had dinner. Then my friend rose up off his seat and ripped THE loudest fart and exclaimed "OH MY GOD!". After the fact, we realized there was a dude walking down the sidewalk at that same moment. I can only hope that it made his day...it at least seems like something that would have made a funny story for when he got to where he was going.