Originally Posted by SmileyJones

He could do it at night, I guess. Or during the weekend or something. He might still have to call to get the janitors out.

But unless the school is made of wood, I'm not sure it'd be very easy to blow up in the first place. It might start a fire in a few rooms.

Anyway, think of the threat as getting a break and an hour of fresh air during the day. Helps to stay positive