Is this a practical joke!?

I walk into the TV room, 2 sheets of paper stuck to a pink stapler in my right hand.

"Is this a practical joke?" I yell.

My sister Marianne looks at me strangely. "What? What happened?"

"Okay, look at this stapler. Something or someone removed the little metal thing that bends the staple into it's bent shape. The staple went right through the plastic of the stapler. This paper is stapled to the stapler!!"

As I'm pulling the staple out of the stapler in order to free my chemistry homework, Marianne admits, "that was a practical joke, but not an intentional one. The metal thing fell off while I was using it, and I didn't bother to put it back on. You should go look for it."

So I go look for it, and after a few seconds give up in favor of continuing my homework.

Returning to the other room, I tell Marianne, "I couldn't find it, so I made a temporary solution. I put a piece of paper on the stapler that says "DO NOT USE."

"Aww, you should've left it," says Marianne with a smile.

-Rebecca