My friends and I set a tree on fire once just with some chlorine and sugar. It was a regular ritual in my hometown... gather the boys, pitch a few dollars toge

My friends and I set a tree on fire once just with some chlorine and sugar. It was a regular ritual in my hometown... gather the boys, pitch a few dollars together and buy some chlorine from the local big box stores that sold it as pool cleaner. If you mixed the chlorine and sugar together in a water bottle, and then later added water, it would explode with an impressive pop after a few seconds. We were carrying a few of these bottles in a backpack one night when suddenly, I heard a hiss. Apparently water isn't needed for a chlorine, sugar, water bomb... the jostling of the two powders together in the backpack was enough to start the reaction. By the time my friend could get the bag off his back and up to his ear to listen for himself, one of the bottles exploded. Said friend proceeded to throw the backpack as far as he could, as we all scattered in different directions. We met up later, and walked home past where we had thrown the bag earlier. All that remained was a scorched tree and a few firemen. I think that was the last time we dabbled in that sort of "fun". By the way, my friend's hearing is fine.