When I was in high school, my chemistry teacher was one of those bizarre, old-school chemistry teachers.
He used to keep a jug of picric acid in the supply area, which amazingly enough he had bought at a yard sale. Whenever we had to go and get something he’s always say “boys, be careful around that jug. It’s explosive.”
Years later, after college I was back in my home town visiting my mother, watching the local news, when a story came on about a bomb squad that had been dispatched to a local high school because of some high-explosives that the then-current chemistry professor had found.
Guess he wasn’t particularly old-school!
… why we can’t have cool things anymore…