Oh Lorde... seventh grade, two major microwave mishaps in just one week.
1) I was making Easy Mac one day and for some reason I absentmindedly put the cheese mix in with the water before I heated it up. I came back a few minutes later to find melted cheesy water EVERYWHERE, leaking out of the microwave, all over the counters, etc.
2) A few days later, I had some pizza in the fridge I wanted to heat up. It was wrapped in tin foil. Normally I just throw pizza in the oven on the same tin foil it was wrapped in... but this time I was lazy and decided to microwave it, but I forgot to take it off the tin foil
Burnt the back of the microwave before I noticed the burning smell.
After both of those, I wasn't allowed to use the microwave for months