Destroying the appliances
There are some things that everyone should be taught as soon as a child is able to make their own breakfast. “Metal does not go in the microwave” is one of these things. It’s a hard and fast rule, never to be broken unless you want to start a fire that is.
A jar of chocolate spread, with glass and metal together? Step away from the “start” button. It looks like we got here too late for this guy, though. He won’t get his warm chocolate spread and he now needs to buy a new microwave.