Teacher in “A Fly In The Ointment”

Now then, Franz, I've read your short story; frankly, I find it bizarre. Do you expect the reader to believe that one night, a fellow went to bed, and the next morning, he woke up as an insect? I mean, really. Have you been reading too much Spider-Man? Do you know anyone who looks like a daddy longlegs? It's unbelievable. It's... [sees Zipper in Nimnul's body] It's brilliant! A+!