1. It turns out that running around varsity trying to perform multitudinous administrative tasks is more tiring than sitting at home doing interesting projects. In consequence I'm going to borrow some things other people have said (as well as I remember them) to make five.
2. While discussing shapes of trees that are good to climb: "a melting candle, which is like a squid."
3. Talking (initially) about time zones:
"I always get my pluses and minuses mixed up."
"Always? What's three minus four?"
"And four minus three?"
"So subtraction commutes! Is addition distributive then?"
"Yes, it's normal."
"Wait, the integers aren't a ring then."
"Nope, they're a helix."
4. Trying to work out if I can take PDEs as an elective:
"The lectures aren't timetabled; the students and lecturers will negotiate the times."
"Clashes shouldn't be a problem then."
"Well, that depends on your negotiating skills."
5. "Can I quote you on that?"
"Yes. In or out of context."