ha ha ha, look I've been reading this along, and I'm only 14, I'm a cirtified pyro, and idiot... but i was looking for somthing fun, but maby somthing just to pop your sister with when she ticks you off, you know? so I thought, what if you had a seperate chamber, where you could preasurize things (seltzer, tonic, or baking soda and viniger, etc), so it would shoot. I've thought and planned, and I see that it obviously dosn't have enough power for a potato but what about things like plastic bags melted to make a pellet? I'm currently trying out somthing similar, please write back if you have any ideas, or questions for ammo, or preasurization....