Tornado vs Bathroom Floor

We have a lot of windows in our school.  Because of this, there are very few "safe" places in the hall during a tornado.  Today we're having severe weather warnings and the principal suggested that if we need to, we take the kids in the bathrooms.  As in, get down on your knees in a middle school bathroom with your face just inches from the floor.  I don't know about the kids, but I think I might take my chances with a tornado.