By Wand Agency
The picture may look like a mushroom cloud, but it is actually a can filled with hydrogen exploding. The can is fired into the ceiling. This demonstration still needs just a little improvement in the area of safety (but it looks really cool). The Problem-The partial pressure of hydrogen drops as the gas escapes and is replaced with air. This causes the reaction to be an explosion insead of a flame. Hydrogen is a tempermental element like that.