My SNES was hungry so I gave it toast, it didn't like it, then it said it wanted some juice to wash it down, it then proceeded to smoke a lot and catch fire.
Other than that.
I was using my brand new computer, spend over $1500 on it, and I got the BSoD, I messed around for a while finding any problem I could and fixed them, everything went well....for 10 minutes, then it did it again, the motherboard supported 4gb RAM, I was using 3gb, and I couldn't find a problem, then it turns out Gigabyte decided they'd put a feature it that allows only 4 SIDES of RAM, so essentially, my two 512mb sticks were useless, but the damage was already done and my board fried. I'm still having an ongoing battle over the warranty, seeing it said nothing on the box, they didn't give me the manual and didn't tell me about it.