My intro inorganic-chem class had the best safety video, described as one "Dr Anxiety". Among other thing like a glass tube being into a stopper that ended with blood spraying everywhere, it had someone in a lab coat pick up a 1L reagent bottle off a shelf, eye it for a while, and say, "Hmm.. I haven't used this in a while, but I'm sure it's still good.". As soon as they turned the cap, it exploded into a giant fireball, complete with the lab guy running around on fire. Rewinding and pausing the video revealed that it was diethyl ether.

I kind of wish I could find a copy of that safety video....