To illustrate the clusterfuck that was my last employer, we had a couple occurrences where popcorn was left in the microwave too long and ended up smoking, setting off the alarm, causing 1,000 employees to leave the office and an awkward explanation to the fire department by our facilities dept. Ultimately signs were posted above the microwaves: "No popcorn in the microwaves, Disciplinary action will be taken for violations."
"Hey Joe, heard you lost your job, what happened?"
"Microwaved some popcorn in the cafeteria."