I've got two and they both involve me. Both of my stories take place in the gym I used to go to, very hardcore place, known around town as the "juicer gym" or the "steroid factory", concrete floors, old dried blood at random places on the floor(mostly from nose bleeds due to high BP), black iron every where you looked, etc. Anyways, I go to work legs one evening in May a few years ago, I'm wearing an old, worn pair of jeans that I had been working out in for quite a while, the problem was that they were old, and I had just recently added about 15lbs to my physique due to the cycle I had been on. There was a decent amount of people working out, including a group of 18-19yr old girls that had just joined a few days prior(only to watch all of us guys train because women hated our gym other than that), they were using stairmasters that were on the second story, facing directly towards the squat rack. I always start with squats so I go throw on 135 and warmup, then 225 for a second warmup, then I throw on 315 for my next set, which was nothing new to me, so I wasn't trying to show off or anything like that. I had noticed that my pants had become tight in the ass from the sudden weight gain and had meant to get some new ones, but forgot to do it. I unrack the weight and begin squatting, when I got to the bottom of the third rep I heard a sudden loud "pop" and immediately felt a draft in the rear of me. All I can hear is people laughing and saying "Oh my God", then it hit me. My pants had split right down the center of my ass crack, as did the boxers I was wearing underneath, leaving my bare ass hanging out at the bottom of the squat I was attempting to perform. I even had to laugh at myself. Needless to say I had to go home and change.
The second story took place in the same location, except it was after hours when the gym was closed to the public. I had made arrangements with the owner at the time to train later at night because I couldn't make it in there during normal business hours. This is when I had only been working out for about 4 months, so I didn't know a lot of things. In that gym there was a decline bench that was very low to the floor, and had no self spotter. I decided that I would use that for my next exercise, and on my second set using 185lbs, which was too much weight for me, I got my self stuck under it. I tried dumping the weights but it was too low to the ground to be able to do that. I was stuck like that for about 20minutes, when the owner and a friend happened to come in for something they had left there(lucky me) and rescued me. They asked me if I was alright, which I was except for sore arms from trying to keep the bar off my neck. They started busting up laughing at me, and I felt really fuckin stupid. Hey, we were all new at some point, right? For a long time I never went near that decline bench again.