I've just read through this thread again and I remembered so many more grizzly moments I've had.
My mum had one of the worst; she went to see Air Force One with my dad (she had a thing for Harrison Ford) and when she got up at the end, her jeans were all damp. Now, my mum didn't pee herself, but someone else had, and the cinema staff had not cleaned it up. Hence my mum was soaked through with someone elses piss. She went to the staff, and received one free film ticket. So my poor mum, who at the time had me and my sister to look after (we were fairly young) had to find time to come back on her own to see a film. I don't get why they couldn't have given one to my dad too, since he was the one who had to walk out with a woman with sopping wet piss-soaked jeans.
I myself have had some pretty awful experiences (not counting above Inception incident). Like my mum, I hate people kicking my seat. Unlike my mum, I can't turn round and tell the little bastard behind that if they carry on I will break their legs. I did used to work in a cinema though (I'm not saying which one in case I get in trubble, but I will say I now watch my films at Vue in Norwich as it is a lot cleaner and nicer than the main cinema).
During the screenings of the final Pirates of the Caribbean film, people liked to pee in cups and leave them for us to clean up. One day, my collegue found a tub of what she thought was Ben and Jerrys. It was actually poo.
I've been the bouncer who tells people to move out of the premier seating. And I've been the poor idiot who stands there directing those with tickets to their premier seating whilst chavs have thrown food at me, called me fat and stupid, told my collegue his mum should have had an abortion, and told me I looked like Shrek. I feel for the staff, I really do. But not in that place, since they were all a bit psychotic from having to work there and were no longer normal.