– Try adding soda flavoring to a SodaStream bottle prior to carbonating it – ignoring the multiple warnings on both the bottle and machine. A friend actually did this with spectacular results! The bottle exploded, sending soda to every square inch of the entire kitchen.
– A nephew of mine learned the very hard way why never to try extinguishing an Oil Fire in a frying pan using water. Boruch Hashem he was not harmed, but he did need to buy a new stove and hood, and repair the wall behind it too. In short, the water turns to steam droplets, encapsulated by burning oil. It essentially creates an instant explosive fireball. People have gotten horribly burned by this mistake. Yet it is not something intuitive or so obviously stupid (like some of our other joke hacks,) so many people do not realize the danger. Mitzvah Lefarsem!
– Put an incandescent lightbulb in the microwave to watch it glow.
– Put a metal fork in the microwave to watch it spark.
– Having to throw out the microwave with burnt holes in the walls from those two experiments, including a melted mass of metal that used to be a fork!