I've had a bumper trailer come off. Not too much my fault either.. one night my FIL says to me, come with me with the utility trailer to go out and pick someone up out in the woods who broke down on their motorcycle.. use FIL's pickup, ask him where the ball is, in the bed ( its dark) feel around for it , put it in receiver. hook up trailer... go down road.. funny it doesn't feel like it is even there.. when I make a right turn I find out why... thing is being pulled by the safety chains... wrong hitch ball, too small,bounced right off the truck and since the utility trailer has little tongue weight was just pulling it along by the chains, it doesn't drag the ground.. .
I've also had my fifth wheel come loose in my backyard... lesson in that is always lock the safety catch.
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