Once was going for an all time high with a big weight jump on powercleans, wasnt expecting to get it past a deadlift so was really psyching my self up for it, springing my quads and waiting for the heavy beat to drop on my ipod.
Needless to say I was so psyched the bar flew up a lot faster then i expected and simply knocked me to the floor. The whole gym turned to look at the sound of 290lbs slamming the ground. Have no idea how I didn't get injured, especially since i landed with my feet in a groin stretch position.
I've also seen a guy doing squats far to heavy for him and made the rookie mistake of putting his hands on the power rack instead of keeping them on the bar, the bar dropped and crushed his fingers......ouch