The only prof I've ever heard use the expression "I'm on crack," which is pretty cool.
Unfortunately, he also invented the WebQuiz?. Ask AndrewSchoonmaker about the quality of the code which operates that thing. Suffice to say, it's a great new way for profs to torture their students. I mean, forcing us to do reading? If that's not evil, I don't know what is.
On the plus side, he's one of the few Physics profs that SeleneTan doesn't find scary.
Other things said by ProfessorSaeta include:
QuantumMechanics?, Spring '07
Heard in Galileo, Fall '10:
During Physics 18, Spring '13:
AlbertoRuiz?: Professor, what's with this problem? The statement has the radius as "r", but the figure has an "l". ProfessorSaeta: It's a Korean "l".