Not sure if has ever been mentioned, but it really annoys me when people in four wheel vehicles with plenty of clearance slow down to a crawl to go over a speed bump. It's not a slow bump; go over the damn thing like you got a pair. The same goes to railroad tracks, people slow down like their car is going to fall apart if they go over them at normal speed. Are they slowing down, hoping that they will get ran over? I sure hope they do.