Why do some people call bragging B?

In ancient times, people were bored for fun! A cow was brought to blow it. One of the landlords was amused and said, if anyone can blow this cow to death, I will give him five thousand two hundred silver and three big houses. /So/People try their best to kill cows. Just when everyone gave up, a fool in the village took a braid of garlic in his hand and ate it casually ...! ! So the fool got a generous reward from the landlord ~ this story spread from one story to ten stories ~ so people used bragging as a metaphor for the impossible!