@masonwheeler That is all kinds of wrong.
In my college level chem labs we didn't even look at HF. I doubt we even stocked it.
In organic chemistry we did deal with lots and lots of stuff like Diethyl Ether (will blow up if somebody makes a spark in the next county, or the next room that somebody was using a bunsen burner in), Acetone (might crystallize and blow up if you look at it the wrong way), lots and lots of stuff that will react violently with water, burn you badly, take your skin apart, or just outright poison you.
The standing rule in the lab was: If the professor said "Get out of the lab," you got out. Right away. No questions, nothing, you bailed out. This rule was invoked once when the professor noticed a student's reaction starting to produce orange fumes. In case you aren't familiar with why this was an issue, check out the Wikipedia article on Nitrogen Dioxide. When we heard the rule invoked (twice, the first got our attention, the second we responded to), everybody ran out the exits as fast as we could. The professor put the whole thing in a fume hood until the reaction stopped.
I was not a fan of that lab, especially after one accident (ugly green toluene derivative overboiled in a flask and sprayed all over me and could have blinded my professor) and one big scare (nearly blew up a fume hood when I got a bottle of sodium wet).