SpudFiles

Just found out about this thing, looks crazy simple to build for some mindless backyard blasting! Not quite sure how the nozzle works tho, it seems to be watertight when the gun is filled but water can squirt out when it's being overfilled so I'm guessing it's some kind of spring loaded one-way valve.

https://www.youtube.com/watch?v=GeCpxmiw7po