Random Pop Gun Thing

Yes, a very creative title, I know... Sadness... only a few blogs left... *sniff*
So on Friday, while carrying my brother's various prizes while he bounced maniacally in a bounce house at the fair, Bean and I discovered the massive fun involved in this particular little toy. Who would have thought it would be so addicting? :P The gun works because of pressure, and also exhibits projectile motion of a sort, so naturally the first thing I thought of was physics...
To "load" the gun, you pull back on the handle, which applies a tension force on a string and causes a net force which equals ma (mass of the cork * acceleration) to accelerate and wedge itself into the hole at the end of the gun. When the handle is quickly pushed together again, the volume rapidly decreases, and using the rule PV = nRT, since the number of moles, temperature, and constant R stay constant, when V decreases, P must increase. Finally, the P increases enough that this force overcomes the static friction between the cork and the edges of the hole at the end of the gun. When this happens, the cork flies out, increasing the volume and decreasing the pressure. The cork then follows projectile motion, continuing with constant X velocity (assuming no significant air resistance) and accelerating downward at a rate of 9.8 m/s^2, until it reaches the end of the string and is yanked back by the tension and falls. The cork then hangs at equilibrium, with it's mass balanced by the tension in the string.

I've just noticed that the little kid in the video seems to be mesmerized by Bean repeatedly popping the pop gun... XD