The Unwise Microwave Experiment guy shows how to melt a beer bottle in a microwave oven. You have to prep the bottle by using a blowtorch to make a red hot spot on the bottle.
Stick around for the end of the demo to hear his explanation of how it works.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects