Dueling Ambiguities

A sign in the lobby of my apartment building today said, "Elevator will be shut down for servicing tomorrow from 11am to 2pm."

And someone had scrawled underneath, "Is tomorrow today or tomorrow?"

This struck me as interesting because the latter sentence would have been completely meaningless except in the meaningless context it was in. But in that context, it's a perfectly reasonable question. Sensical nonsense is one of my favourite literary forms.