In French class, in secondary school, I had to sit next to this lad whom the whole class nicknamed "Crazy Steve," he was a sound guy most of the time but he did odd things. In one particular class he slowly unscrewed all the screws that held the table top to its frame and pocketed the screws, and when I asked why he said "Just in case."
The next day in the same class we sat at the same table and the teacher shouted at him for something or other, and Crazy Steve stood up and gripped the table top, and flung it up and away from us, into a wall. He got in trouble for obvious reasons, and I got in trouble because I couldn't stop laughing about it. It was brilliant. It's probably the only time I was in trouble too