Do you want to make a diet Coke and Mentos Rocket? Well, first of all you have to buy a 2 litter bottle of Diet Coke and some Mentos. Then, go outside, because you don't want do it indoors, believe me. Wrap the paper cover off the Mentos, but leave the foil wrapper on and put the roll into the bottle. After this, you'll have to close the bottle and shake it. In the next step you'll have to open slowly the cap bottle until it starts fizzing. Throw it down with power and be sure there's no one around you that can be harmed.