Boiling Water in a Paper Cup.
Man is it hard to find paper cups. Two grocery stores and all we could find was plastic or styrofoam. So we took the books advice and made our own using origami. So our first failure in a Dangerous Thing could be blamed on inferior folding technique. The book claims it will work though, so eventually we’ll have to try it again using a real paper cup.
For us it started heating up, but the sides started to catch fire and eventually the water escaped through holes in the side.