Ha-Kochavim Shel Shlomi2003

Headmaster Avihu:
How did this boy reach the age of 16 with the whole world thinking he's semi-retarded?

Yehoshua Eldad:
It's like the joke about the boy and the salt. Everyone thought he was mute till they asked him to pass the salt. You and this teacher of yours finally asked Shlomi to pass the salt, so he did.

Headmaster Avihu:
You ruined the joke. It was the boy who asked for the salt.

Yehoshua Eldad:
[laughing together] Jokes aren't my thing.