The floor that should have existed (and did)

The mission: Get the attendance safely to the office on the 3rd floor. A mundane task for most, but for the students at Treeville Elementary, it was the utmost of privileges. The elevator, normally off limits to the children, became accessible for those lucky enough to obtain that magical slip of paper. He dashed off, accompanied by his friend Billy. They entered the gaping doors, and rode up in a blissful stupor. The doors slid open, and he gasped.

“This isn’t the third floor!” he cried.

Billy broke the confused silence. “Yeah, duh. It’s the second floor. Hurry up.“