Roz: Frasier, would you wipe that guilty look off your face? No-one even suspects you.
Frasier: Why not?
Roz: Because you made such a big deal about how playing pranks was beneath you!
Frasier: Oh, they're not only beneath me, they're beyond me. I'm going to accept my limitations, and be satisfied to merely be witty and urbane. Even my most barbed comments never drew blood.