So, twice (that I know of) we have been warming something in the microwave when suddenly sparks start to fly:

There doesn’t seem to be a pattern - each of the items in the microwave this time (ziploc lid, carrots, black beans) have each been microwaved before without incident.

Is our microwave dying? Could it have something to do with the iron content of the food? Do I need to buy lead onesies for Libby?