I once caught a old woman between the wall and a revolving door, sounds bad but it was really funny. I was exiting a store and checked for incoming people, there where none, so I start pushing the door really hard to make it spin after I get out. Mid push the door suddenly stops and I'm all "wtf?", then I see this old woman stuck between the door and the wall gasping for air. There where some people that helped her get out then started to yell at me and I couldn't help but laugh and say something like "Not my fault she thought shes a ninja and tried to slip between the fast spinning door...". It depends on whos fault it is but if you're dumb you get what you deserve...