Once a frog sees a one rupee coin on road and becomes very happy. Standing there with a big smile on his face he pumps himself with pride. Suddenly he sees a pack of elephants coming towards him. But now he thinks that I have become rich because of this one rupee coin so what can these do to me. I will not give them side, they will have to find out another way. Soon thereafter there was flat (frog)chapati found near one rupee coin.
similarly, Paundrak also challenged Krishna and got finished within no time.
This is what happens when people become unnecessarily proud and compete with powerful personalities.