Back in the early days of our marriage (before kids), I got my wife to try mountain biking. She did pretty good, but one day hit a big root sticking out of the ground and went over pretty hard. She got really mad, picked up the bike, and threw it to the ground and busted the RD. The only thing I could say at the time was, "Honey, if you are going to throw your bike, throw it with the drive side up."