When I was a child, there was once when everyone took too long to exit an elevator. So when it was my turn, the elevator doors closed on me. They clamped on my head cos I had small shoulders, and it was so painful I cried and freaked out everyone. Till now, I'm still sorta wary of stepping in and out of elevators, and I'm definitely not the gungho sort who would stretch out their hand to block closing elevator doors. Strange how little incidents have lasting impact.