The students in the monastery were in total awe of the elder monk, not because he was strict, but because nothing ever seemed to upset or ruffle him. So they found him a bit unearthly and even frightening.
One day they decided to put him to a test. A bunch of them very quietly hid in a dark corner of one of the hallways, and waited for the monk to walk by. Within moments, the old man appeared, carrying a cup of hot tea. Just as he passed by, the students all rushed out at him screaming as loud as they could.
But the monk showed no reaction whatsoever. He peacefully made his way to a small table at the end of the hall, gently placed the cup down, and then, leaning against the wall, cried out with shock, "Ohhhhh!"