Do you know much about mycoplasma?and it got worse from there. Turns out he thinks he may have an infection but he doesn't plan to do anything about it because it's a hassle and he's read that the parasite is present in a large proportion of cultured cells anyway. Actually, he's pretty sure he does have it, because he's seen things moving in his cells when he looked at them under the microscope.
Aaaargh. Mycoplasma is highly, highly infectious stuff, and nearly impossible to eradicate, and it's mostly asymptomatic except that it makes cells prone to die catastrophically if you stress them. I am so not impressed that my cells are neighbours to cells belonging to someone with this kind of attitude.
While I am distracting myself from the fact that it's another four hours before I can have a cup of tea, I also discovered a noise more unbearable than nails on a blackboard: putting dry ice into a metal scoop, which then contracts very rapidly due to the cold and makes a truly infernal squealing noise.