Hyakujo

A monk asked Hyakujo, 'What is the most wonderful thing in life?
Hyakujo replied, "Sitting alone on top of the great Taiyu mountain."
As the monk bowed, Hyakujo... struck him.

This is a zen kohan, and the answers aren't necessarily anything you can logic out. I believe the classical understanding would be why are you bowing you should be booking for that mountain top, if you were enlightened.