Potato Spud Gun Experiment

For Science today we made potato spud guns. And its not the first time we have done this experiment, we have attempted to do this experiment before. And we do it is by getting a straw and stab it in your potato, then you take and you will see it has so potato in the straw. Then repeat the step on the other side of the straw, then grab something like a tooth pick and then push the potato towards the other side where the other potato is, but make sure that you're not poking a hole though the potato. Then if their is hole in the straw, the experiment will not work because of how this experiment works. How it works is after you do that potato part their is air in the space of the potatoes so when you push the potato towards the potato 2, it will push the air to potato 2 and the air has no where to go so it pushes potato 2. And then potato 2 popes out! And we recorded how far it shot and who got the best shot.