The other night I was on the cable machine where they have the pull up bars in between the two cable attachments. I hope I describe this correctly because I can't think of the proper name, but almost every gym has one or two. Anyway, I was performing one armed reverse flys to work my posterior delts. Well I get done one side and then rotate to do another side and some dude jumps right in and starts doing pull ups, so I had to wait till he was done to finish my set because on the full contraction part of the exercise I would be punching him in the balls. I politely waited since he so politely interrupted my set and then after he was done I grabbed his attention and told him he needs to brush up on his gym etiquette and watch the F**k out lol! My gym is also the worst for putting weights back. Drives me nuts. Rant over lol.