Advanced Combustion Spud Gun: Firing Demonstration

So as promised here is a video of me loading and firing the spud gun.  I use a pipe as a "ram-rod" to push the potato down the barrel.  I have seen much more advanced "breech-loading" types of spud guns, that work similar to a bolt action rifle, but that will be held in reserve for a future project.  Here you can see my brother getting ready to fire from the hip.

Here is the actual video of me firing the cannon. Its a bit small (shot before I had an HD Camcorder) and hard to track the spud flying through the air, but we estimate the cannon was slinging potatoes between 300-400 yards.  Enjoy!