A[L]C said:
The only thing in my list at the start of the thread that will blow up the microwave is the can of bakebeans.
The light bulb will shatter and there will be glass peices that will be smaller then grains of sand and its really hard to clean.
CDs are perfectly safe from experiances and so it the rest of the list apart from the bakebeans and the messyness of the lightbulb.
Stand a CD up a against a cup and you will see it spark right through the disk it self.
Lay it flat and the sparks should look like they are jumping off of it
EDIT: CD danger is 1. 1 being the lowest and 10 being the highest.