aww we never had anything under our school building. the most exciting thing that ever happened in my elementary school was some photographer taking pictures of the first graders had a camera that had a flash that set off the fire alarm (that was a terribly constructed sentence). We had to file outside and then the firemen came and searched the building for 1 1/2 hours. I got to miss gym.
Ironically, that fire drill happened on 9/11/01.