This is a story I heard from my friend.

There was an elementary school, Friday teachers had stayed at school at night and had to look around in school.

The teacher who came in turn on that day was a professor S who came in recently.
And the patrol began around 8:00.

We looked at each room, and Sensei said that there was no abnormality, the last was a gymnasium.

Then,

Bang Bang Bang ...

Hmm? Is anyone there! Is it?

Professor S asked.
However, there is no reply.

Sensei: "Well, I question, yes, hit the ball once, if not, would you hit the ball twice?"

Sensei: "Are you a student here?"

......... Pong .........

Sensei: "Do you have any business here?"

......... Pompon ...

Professor S could not hold it, turned on the light ....

Then, there was a boy.

Moreover, it was bouncing the ball with his head, not the ball.

The teacher fainted afterwards and he seems to have been asleep in the public health room when he realized it.

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