Ever heard the story of the deaf frog? It goes like this. A couple of frogs fall into a deep pit. The frog society gathers round to discuss the problem. The frogs in the pit try to jump out while the circle of frogs peering down at them begins to shout at them the pit is too deep. Nothing can be done.
After several attempts, the frogs at the top become agitated that the two frogs in the pit are wasting time. They begin to shout disparagingly at the futile efforts of the two, shaking their frog fists at them. Upon hearing this, one of the frogs finally gives in and calls it quits -- rolls over dead. The other frog continues to jump in spite of the jeering from the crowd, bounces off the side of one wall and jumps to the top and out of the hole. The circle of frogs, amazed at what they have seen, crowd the jumper and slap him on the back. When the crowd gets quiet, the frog in charge asks him why he didn't give up like the other frog. The frog answers by pointing at his froggy ears and shaking his head. Apparently the frog was deaf and believed the crowd was actually cheering him on to success.
The other story, scientists find that loud noises can be used to cajole frogs into jumping. Even cutting off one or more limbs will not deter the frog's hop response. Baffled scientists ultimately discovered that cutting off the fourth limb caused deafness.