Sometimes people do it for fun, sometimes out of ego or other strong emotions. They push a person till he surrenders.
When we are in the superior position we tend to forget about the cat, the cat always try to escape injury. It uses all its skill to run away but they say that a cornered cat reminds one of its wild sister, tigress.
In our jest or ego we ignore the feeling of others, and sometimes they surprise us by striking back with the vehemence of the cat, or worse, the deadly vehemence of a threatened snake.
That is why wise people don’t try the patience of others. They never push someone to corner. They let others decide what they want to do or should do.