being the clumsiest person in the world I have managed the following in or around a 172
1) walked into the flaps
2) the pinched fingers in the aileron thing
3) fallen off the step when checking the fuel tanks, every which way you can think of. Failed to get on the step getting up, overbalanced once up there, gone to reach for the ground with my other foot and somehow missed.
4) whilst still trying to figure out the order you do the seatbelt/seat adjust/ shut the door in, found myself hanging by my seatbelt out the door trying to reach it in order to shut it. if that clip hadn't held I would have been face first onto the concrete
5) pinched finger in the baggage door release (don't ask how!)
flying is dangerous !