Delivered with a Ron White style:
you had a fifty fifty chance of getting it right ...... you were wrong!

Let me help you out, which way did you come in?

My personal favorite for work:
"Didn't you see the sign on the front door that sez: WARNING, thruth, logic, and reality cease to exist beyond this point! Enter at your own risk!"

Another fav:
Truth is the first casualty in a manager's meeting.

The Karma bus always has an empty seat when it comes around.- High Brass

There's battle lines being drawn
Nobody's right if everybody's wrong