Instant Anger - Just Add Boss

First conversation of the morning.

The Boss, sitting on the far side of the room, holds up a piece of paper, blank side towards me.

The Boss : "What's this?"

Here's me : "I don't know."

The Boss : "Well where did it come from?"

Here's me : "I don't know."

The Boss : "Well it was on your desk."

Here's me : "Well what is it?"

The Boss : "That's what I'm asking you."

Here's me : "Well I mean could you let me see it?"

The Boss : "Lose the attitude."

I will crack today, I am almost certain.