Okay... First video...
WHAT IN THE WORLD? METAL CREATES RICOCHETS. if your going to fire a 50 cal... Don't do it at a METAL PLATE... Come on. .50 cal is a canon of a rifle... it is safety PLUS with that rifle.
If it is real... You ALWAYS release the clip, then pull the slide back to check for rounds.. that kid should get a severe beating and be made to fire that gun 5000 times... Make him REAL sore and NEVER want to touch it again.