Cover your ass

One day a donkey fell into a well. The farmer couldn't get him out, so he knew he had to cover him up. He called in his neighbours, and they all strted to throw dirt down the well, but instead of burying the animal, the donkey would share the dirt off and take a step up. Pretty soon, the pile of dirt got so high that the donkey stepped over the edge of the well.
Moralists use this story to preach that all our troubles can be stepping stones, that we shouldn't give up; instead shake it off and take a step up. Comedians, however, note that as soon as the disdained donkey got to the top he ran over and bit the farmer. Their moral is that if something goes wrong, try to cover your ass. It can come back and bite you.