the ill make it quite plain upon this page - what they were really up to - because you can see that they are talking about human beings and not 'snack cakes':

http://www.twinkiesproject.com/radiation.html

Conclusions:
Microwaving a Twinkie is a bad idea. If you want to cook a Twinkie, may we suggest the rapid oxidation technique?

This is an extremely hazardous test. Do not attempt this experiment without proper safety equipment, including (but not limited to) adequate ventilation, respirators, fire extinguishers, Sweet Tarts, and plenty of those little tags on mattresses that say "Do not remove."


Possible Applications:
If one wanted to set off the equivalent of a smoke bomb in a place where all one had was a Twinkie and a microwave, one could duplicate this experiment, setting the microwave for 10 minutes on "HI". This would give enough time for one to run away quickly, while the resulting smoke and odor would be enough to leave nightmares in the minds of your victims for a long time.