The communal microwave at your local 7-Eleven is one of the most beloved and disgusting amenities of the convenience store chain. It just so happens that when a patron uses that microwave to heat a urine sample encased in a hand warmer, things can get messy and explosive.
Police in Beaverton, Oregon evacuated a 7-Eleven when someone did exactly that, causing a blast on Tuesday, according to a report by local news station KATU. Upon inspection, police were surprised not to find some kind of nefarious chemical agent or explosive device in the appliance, but instead a putrid urine sample. This was serious though, as the Portland Police's explosives unit was summoned to clear the scene.
Beaverton Police note that the suspect was most likely en route to a drug test, and thought the microwave at 7-Eleven might suffice as a decent means of heating the sample, which was probably too cold to seem legit at the time. The scheme was ultimately foiled because the urine sample was kept in a hand warmer, which is teeming with substances -- such as iron powder -- that do not react favorably with microwave radiation.