You may be a reference librarian if...

...if you've ever had a library patron BELLOW for more paper in the communal printer.

And, upon refilling the printer, the first thing out of the bellower's mouth is, "Hey, that's not what I printed!"

Yah, cause nobody else in the library could possibly have wanted to use the printer around the same time, too...

It would be laughable if it wasn't absolutely dependable. Every. Single. Time.