Normal
The drills are a nuisance but if there is an emergency it's better to have had a practice drill. If you are claustrophobic (I am too) you will really feel pressed if no one went to the drill & then panicked in a true emergency...not to say that wouldn't happen anyhow but it helps to be prepared. I go to the drill & try to get a litlte extra space by spreading myself out a bit--looking up at the sky also helps!