Heard this one just the other day.
FAA Inspector sitting jumpseat on a SAAB 340. During the lineup checklist (while rolling into position on the runway) the FO was making the calls and had the checklist on his knee. The flight continued without a hitch until after landing and the pax deplaned. FAA lady says to FO, "Did you have your out checklist during the lineup back there in ‘xyz’?
He says, “Yes.”
“Did you read it as you made your challange calls?”
“yes…”
“Upside-down?”
“Huh?”
“Exactly.”
And she proceeded to write him up. Got him suspended. Bitch.