Getting a story back with no comments except for an incredibly complex abstract doodle on the top margin (from when your classmate got bored in workshop and decided to add her own personal touch to your story)
Circled lines of dialogue with the comment "THIS IS ME!!" double-underlined
Bizarre, unexpected, undeserved validation (in sentences like "This paragraph is the best paragraph you've done all year")
Oh, CRWR 320. You were so insane. I will kind of miss you (but actually not).