Iv'e seen this before somewhere
Unless Im mistaken Iv'e seen this clip in Micheal Moores wonderful documentary-Bowling for Columbine-where this scene was shown after the scenes of the Columbine high-school massacre.This was shown to advertise security metal-detectors in Schools-unless Im mistaken.
This kid or more appropriately young-male, has been able to conceal a nice array of weaponry,including:several types of revolvers and automatics,a derringer,an Ingram and finally YES-HOW DO YA DO IT-a pump-action Remington 870 shotgun.
As if he can walk around a crowded high-school with all of that under his pants and on his person.Thomas Hamilton-the Dunblane killer-had to carry his ammo in a camera or ammo holdall,because his clothes couldn't accomadate the large amounts ammo packs he was carrying and he couldn't carry a longarm easily into the school-stuffed under his pants-because someone might have seen the bulge and known about it instantly.
As for Hamiltons guns-two Browning Hi-Power 9mm MK3 Practicals and two Smith and Wesson 586s .357s-these were carried in both shoulder and belt holsters,that were concealed from view.
By the way that kid is probably most likely to be a 20-something adult-male-not a teenager.