Yeah, well, happens all the time, doesn't it?  There's hardly a day goes by when I don't trap my nipples in a door.  I'll just be nipping through to the kitchen to put the kettle on when whoops! there I go, nipples trapped in the door again.  But just supposing, for a moment, that's it not exactly normal to trap your nipples in a door - humour me here, okay - tell me, did you do this deliberately, or was it an accident?