Never seem to hit the speed bumps, but I've pulled on top of a half dozen or so @#$% concrete parking stops. (Always impresses the people walking by... the only thing worse is grinding reverse gear when backing into a spot at a car cruise - Ugh!)
My own fault, I've had to learn to stop well short of them.
The other problem is when you back out and see a spot of coolant or
oil that you are not quite sure wasn't there when you pulled in.
- Dan