Okay. It’s a devilish thing to do. A stupid prank, but the girl was not in the chair. Yes, she was inconvenianced, no, she didn’t break any bones.
Let’s not go overboard trying to prove how ‘good’ we are by condemning and punishing somebody for a dumb prank.
A simple apology will do.
He need not be Drawn & Quartered over this.
The damage to the chair could cost this young girl mobility for several days...