[cage433]

I've had my bodyweight (110 KG) stuck on my chest with no ill effects other than embarrassment. As the parents say, simply slide the weights off, or ask anyone nearby for a hand.

One thing that is extremely dangerous is using the 'suicide grip' when benching - i.e. having the thumb and fingers on the same side of the bar and simply resting the bar on the palms. It's stupid, but a surprisingly large number of lifters use it.