I played football in high school and college, so I used to workout and lift weights six days a week. Back in the day, I could bench press over 300 lbs. and squat over 500 lbs. Now I have a slight case of furniture disease - my chest has gone down into my drawers.
Anyway, I've seen many a mishap in the gym, mainly from guys using bad technique or putting too much weight on the rack or letting all of that testosterone go to their head.
And in this video, it shows.