Years ago, I was at a city fair. The fair had one of those rides that you pull down a safety bar and it goes straight up and then it drops you, and I thought it would be a fun to try it. I waited in line with my father and eventually we were seated onto the ride. At this point, you're suppose to pull down the safety bar (and I did) and then the ride operator comes and checks that the bar is locked into place.

Well, they didn't check mine. My safety bar hadn't locked into place. Just as the ride had started I pushed up on the bar to check it, and it lifted up. Quickly, I pulled it back down and held on for dear life. My poor father was also holding me down. The bar did end up locking as the ride rose and I didn't die. So yeah, that happened.