Many years ago, got woken up by the fire alarm in the early hours of the morning. Quick check, no fire, reset the alarm and head back to bed. Alarm goes off again, check again, reset alarm. After the fourth reset phone the fire brigade. They turn up and start to check all the flats in the block.
Turns out the guy in the top flat had come home from the pub/club after a heavy session, put some bread under the grill and then fallen asleep. A rather charred oven/grill was deposited on the front lawn.