Back in the 1960s and 70s, a small factory made glow-in-the-dark clock and watch faces across the street from the bakery and kitchens for my school district. They used a paint which released tritium as it dried, and their fume hoods vented out the roof (why not? plenty of air circulation!) and the prevailing breezes carried a nice dose of alpha particles across the street on most days to settle out on the food that we were served. When somebody somewhere was tipped off that this arrangement may not have been completely kosher, some local muckrakers and a couple of curious scientists showed up with a Geiger counter. One dish in particular, sunshine cake, was damn hot and legend has it that the name alludes to its brightness....I blame all my societal maladjustment on this lapse in food safety.
Kids, don't trust the food just because the lady with the hairnet says it's OK. Get it checked out by one of the guys in the hazmat suits.