The girl in red snatched your tray. "By the way, Dixie, your story gave me an idea."
Before you could react, she stretched out the back of your briefs and dumped in the food.
[Remember that lunch you prepared? Stuff all the food -- the sandwich, chips, and messy dessert -- down the back of your underwear, but leave the drink for now.]
You let out a soft gasp, eyes and mouth snapping into cartoon "O"s of shock -- though your brain was slow to register what had just happened, even as your briefs sagged slightly.