Check out this hilarious video of a troop who forgets to wear his body armor while on stag. In this case, being on stag also means being on guard duty.
This is a lesson that this guy will never forget because he deserved this beasting, which is British military slang for a difficult training exercise as punishment for doing something wrong.
This guy will never forget his armor ever again and hopefully any time he hears the word “grenade” he gets down a lot faster than that. Either that or he had already run several miles before the video was taken.