Don't Put Your Computer Duster into Water
Those canned air bottles that you buy to clean out our electronics contain a chemical called Difluoroethane which is compressed into a liquid in the bottle. When you hold the bottle upright and spray it, the chemical is released as a gas, but if you spray it upside down, it releases as a supercold liquid. If you collect an amount of Difluoroethane in the liquid form and pour it into hot water, it creates a large steam reaction. The reaction doesn't work with oil, you can check out the explosions and learn why in the video above.