A mouse found a jar filled with grain. With so much easily available food, he stopped searching elsewhere and eventually ate himself down to the bottom of the jar, where he found himself in a trap he could not escape.
One day, a farmer’s donkey fell down into a dry well. The farmer couldn’t figure out how to get the donkey out and eventually decided that, rather than let the poor creature die slowly, he would suffocate him with dirt. But after shoveling in a bunch of dirt, the farmer realized the donkey was just shaking the dirt off and stepping up. The farmer kept shoveling until the donkey was close enough to the top to jump out.
Another version of this story has the farmer deciding to lower food and water to the donkey while he tried to think of a way to get him out. Day by day, the donkey ate, pooped and stepped up until eventually it was close enough to the top to jump out.