cruel sense of atc humor
apparently this happened at KSFO a while back
Lufthansa 1234: San Francisco Tower, Lufthansa 1234 - we need to taxi back to the gate we're missing a passenger.
SF Tower: roger, cleared to taxi back to gate...
Anonymous Pilot (speaking in a German Accent): Have you checked the ovens?
The Lufthansa pilot got real mad and filed a complaint