The guy demonstrating his incompetence is an IDIOT.
To #### it, you plant your feet on the butt pad, lift slightly, give the butt a half turn and pull. It's a 200lb spring. Once it is cocked, you push the rod back in and give the butt a half turn the other way.
Now the fun part, if you do not fire the bloody thing with a bomb on it, You have to REVERSE the Procedure, easing the spring back down,while pulling the trigger at the same time to ease the spring.
If you dry fire it, you can damage the mechanism.
A friend who was in North Africa woke up in hospital next to a Second Lt. who forgot the cardinal rule when demonstrating it. ie; Get a DEATH GRIP on the thing. The recoil broke his jaw and knocked out his front teeth!
Also put your head down after firing it, as the tail acts like an gun tube and launches the .303 blank in it back the way it came. (better to have that blank bounce off your tin hat)
Mine came with the full size drill round, but I am still looking for the small practice round.
Oh yeah, while it is nothing more than a tube with a big spring, they are illegal in Kalifornia. But then what else would you expect?
If the clown had fired a real bomb off that with the method he was using, his next stop would be the emergency ward at the local hospital.