Turns out the teacher had poured some bromine down a sink, along with something it reacted with.
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.
Open the bottle (under the hood), there's not that much red smoke coming out, dip the pipet into the dark liquid, pull in a few mLs, looks normal, almost like you could precisely dispense small amounts into the nearby target apparatus.
Lift the pipet slowly out of the source bottle, and carefully position it over the waiting reciever flask. Don't be too concerned about exact amounts to be dispensed any more, it can be seen that precision with bromine is not as ideal compared to something like pipetting alcohol, where you commonly lose a few drops anyway.
After all, immediately when you withdrew the pipet from the bromine bottle, the entire contents of the pipet had spewed out from its own gas pressure, into the inside of the hood. Don't worry about the state of your reaction, not a drop of bromine landed where you had intended.
All you can do if you have your wits about you is to hold your breath, carefully put the stopper back on the bromine bottle (without knocking the whole thing over) and fully evacuate, basically following out behind everyone else in other parts of the lab who knew there was a problem as soon as you did, just from the smell.
And that's with the best of hoods.
edit: not my downvote
If you can't do that you should be doing something else with your life. This isn't computing where nothing worse is at stake than money, usually.