Ever wondered why you shouldn't put certain items into a microwave? Let me demonstrate with an ordinary, boring CD:

It's already crackling nicely...

Large flames are appearing...

It's beginning to look rather the worse for wear...

It's melting!

Stopped due to excessive smoke.

I wonder if my CD-ROM drive will still read it?
Don't try this at home!
Unfortunately it's quite hard to photograph anything behind the wire mesh of a microwave oven's door, so you can't quite make out the often beautiful multicoloured arcs that ripple through the CD's surface as it burns.