Inventor Bill Gurstelle demos some things that guys
like to shoot
and inventor William Gurstelle demonstrates three cannons you can
build in your garage. His favorite building material is standard
PVC piping and his ammo of choice is vegetables, especially potatoes.
our fascination with DIY devices that launch projectiles or blow
them up. His caution about safety is simple. He says "you need
common sense more than anything else". (9:04)