This was done last summer and, as you might guess, drawn in chemistry class. It's not really that well drawn as it was a very quick sketch, and I happened to be doing a gas pressure lab at the same time, but I still find is at least mildly amusing.

As a side note, I hated the safety goggles. We were required to wear them, even when all we were doing was boiling water. And whoever used them before managed to get all this icky gunk on it. Everything looks like a smeared impressionistic painting when you look through those things. That, and when everyone wore them, the classroom suddenly looked like the annual national convention of laser geeks or something.