If you announce that there's a tornado outside, usually everyone goes running outside to see it. Wonder if they've tried that? :-)
That would happen here, because we get tornados once every five years or so. Nobody's really sure what to do when one shows up.
Hehehe...one of the guys that came over from NC said that once (before I started working with the company) they had a fire alarm go off so everyone went to their fire- meetin' place and then the tornado warning went off which meant they were supposed to go to their indoors tornado shelter.