You know those bags of rice what they advertise on the telly from that nice Mr Uncle Ben? The ones that you stick in the microwave for a couple of minutes and when you take them out you have a whole meal ready for you?
Well, you know how it says on the packet to make an inch-long tear along the top of the bag? And how you should do that before putting the bag in the microwave?
They aren’t joking. (Oh, look, no question mark there.) If, by some strange quirk of fate or lapse in concentration your bag of rice lacks the aforementioned tear, it explodes. Inside the microwave. Showering the microwave with half-cooked rice.
Here endeth the public service announcement.