My strongest memory of high school chemistry is inhaling bromine vapors (I'm sure we were doing various addition reaction common in organic chemistry). It's go

My strongest memory of high school chemistry is inhaling bromine vapors (I'm sure we were doing various addition reaction common in organic chemistry). It's got a very specific smell, rarely if ever encountered in the regular world. The same chemistry lab had a sign warning us not to "pipette by mouth", but I actually do that today to transfer tardigrades. It gives you remarkable control over the volume transferred.