What's one of your funniest in-class awkward moments?

Today in seminar, we were discussing some poetry and the discussion goes:

Prof: ... and so we can see here the significance of how the speaker's allusion to Frank Morgan adds to ... hold on, you guys know who Frank Morgan is, right?

Girl: ... I lost my virginity to a Frank Morgan?

long pause

burst of laughter

Prof: Probably not the same guy...