My co-worker (let's call her Christine) is an obese woman who usually eats 1/4 of the food at company functions. I'm not joking. I once saw her take an entire platter's worth of cocktail shrimp. Later, she ate a whole tray of minature chocolate eclairs and chocolate dipped strawberries. She doesn't care that other people don't get any at all.

Anyhow, she was chowing down so much food at our company picnic yesterday that my buddy and I decided to play a prank on her. We ran over to the grocery store near the park and bought a container of pre-made tuna salad and 8 cans of tuna flavor cat food. Behind the store, we dumped out half of the tuna and mixed the cat food in. Then we snuck it onto the tray.

Of course, she scooped up half of the "tuna" as soon as she saw it. My friend and I were laughing so hard, beer started coming out of noses.