We did some full auto fire using a Mac 10 .45 ACP submachine gun on Saturday. Several of the folks you see shooting had never fired a machine gun. You should have seen the smiles on their faces after the experience. The Mac 10 fires 900 rounds per minute, which a high cyclical rate. A submachine gun is a pistol caliber machine gun.
You can see the ejected shells flying. And the first photo shows the muzzle rise typical of an inexperienced shooter firing a fully automatic firearm.