I accidentally put metal in the microwave?

I was making soup and I forgot that you cant put metal in a microwave, I put it in a metal pot for 4 minutes, went upstairs and when it stopped and beeped I could smell smoke. There was no fire, but now the inside of the microwave is all black and the handle on the pot started to melt :l I just need to know that it's not going to somehow explode all of a sudden, even though I'm not going to turn it on again.