This didn't happen to me, but I was involved. During lifting at Football practice, the guy I was spotting was doing Power cleans. The weight was to high and he fell backards, I caught the bar but it was so heavey I accidentally dropped it in his lap. He was able to get up and almost got hit in the throat by the bar when he fell.
This is a true story that is a near death experience. If I wasn't there, he would have died, or aat least choked to death if I didn't catch it initially.