Honestly.

[alt_linus]

If a fellow student is having difficulties with equipment or procedures in the Potions lab, it behooves those nearest to take prudent measures to ameliorate the situation rather than stand about snickering. I don't care what your personal opinions of your classmates are, or how they have treated you, or whatever; put the bloody fire out FIRST, and then express whatever bon mots are weighing so heavily upon your mind.

Merlin. Some people.