Hahaah great story guys...for me the funniest thing I've ever saw at my gym was probably the old skinny asian guy running backwards on a treadmill next to me! He ran for a good half an hour at atleast 6mph! I couldn't believe what I was seeing.
As for people I hate the most at gyms, that would have to be the fat guys who wear wife beaters and think they're big just cuz they've got size. They're constantly checking themselves out in the mirror and lifting heavy weights that they can't handle.