Oh boy, I've got a lot of these. I'll edit this post if I come up with more.
Peach State 2015: Someone made Kit announce over the mic that they lost a cube with "a really bright orange side".
At dinner afterwards, Chris Krueger misheard "tight cube" as "Type Q".
Indiana 2015: It doesn't quite count as during the competition, but the 8 hour car ride becoming a 10 hour car ride due to a dump truck overturning on the highway was quite the experience.
US Nationals 2015: Not really funny, but I got REALLY angry when I couldn't write down my 32 move solution to the second FMC in time. Anyone who was at that table with me can verify.
Atlanta Open 2015: Someone had Chris Olson sign his cube, then came back less than five minutes later to get it signed again because the signature wore off.
Someone lost a "black Moyu HuaLong, stock stickers, no logo". AKA the most generic cube in the universe.
Music City 2015: My name was consistently pronounced as "rah-MOHND".
Athens Fall 2015: Someone messed with my skewb while it was waiting to be scrambled, so the scramblers thought it was scrambled and I got a 2 move skewb scramble. I did it just for fun (the time was 1.01) but obviously I got a resolve.
David Ludwig solved a 2x2, dropped it and stopped the timer, and the cube perfectly balanced on one edge at a 45 degree angle with the table.
FMC USA 2015: I was late, had to run to the venue after running a 10 mile race that morning, couldn't find an unlocked door, and had to force my way through an automatic door to get in.