You too can look like a moron for the name of water soaking fun! Some guys who have too much time on their hands have a website dedicated to the history of the water gun and instructions on how to build this bad boy.
This head mounted water gun operates with an antique liquid based fire extinguisher and it is actually more complicated than it looks. For full instructions head over to their site and soon you can be having
the time of your life in no time.
Instructions [UltimateWaterGun via BoingBoing AGAIN]
