Spud-Gunmanship

After cutting your spud in two, pound one half into the barrel of your spud gun.       

Add 10 seconds worth of propane. 

(Count one-potato,
two-potato up to 10)

Screw the cap on tightly.

Push the spud down the barrel.

Ready ... Aim ... Fire !!!!

It goes about 100 yards, more or less.
Taking "food fight" to a whole new level ....
 
The barrel is 1-1/2" in diameter and 42" long, 
The chamber is 3" X 14".  
A lantern igniter is used for the spark.