So, I'm re-watching the first season and have the following observations:
1. No high school chemistry department is going to have Hydroflouric Acid around, let alone sitting on metal shelving. That is serious serious stuff. And when the ceiling collapses, no person would be standing under that, especially not a chemistry teacher who is supposed to know that even the most miniscule drop of it will eat your skin off something awful.
2. Wouldn't they have had Jesse and/or Walter's fingerprints from the respirator? Walter would have been fingerprinted to work for the school system and Jesse has probably been arrested before.
I realize I should suspend this bullcrap, and just enjoy the show, but those two things bothered me.