Frasier: Wait a minute. You just scratched your ear. You were at the library, too.
Niles: I was most certainly was not.
Frasier: The only thing that makes you sneeze and scratch your ear is your parchment mite allergy. So, that was you sneezing from behind the stacks all night.
Niles: [sneezes] I had to go. I knew you'd be racing through those scientific journals faster than a proton in a particle accelerator.
Frasier: Oh, stop showing off.