The 1st shot in this video is a tennisball being shot out of my pneumatic @90psi.  Range was about 200yards.  Not so great.  The 2nd shot was with the propane launcher and about 3 Nerf pocket vortex's.  Range with that was over 300yards (w/ slo-mo).
Just some odds and ends shots of both the propane launcher and some shots of various Estes rockets.
Using the propane launcher to shoot six (6) pocket vortex's.
Night shots w/ slow motion.  The last shot was with the standard Right Guard cannon.
Shot of a pocket vortex exiting a Right Guard cannon.
Pneumatic firing.  Notice: you can't see the projectile exiting, because the high velocity.
Shot of both the propane cannon launching a vortex and the rocket, racing to the clouds.
Six vortex's being shot out of the combustion launcher w/ slo-mo.
This is a DUD shot, with a Right Guard cannon.  (Quicktime Movie)