KIM Jong-un was pictured grinning as he watched crazed North Korean troops smashing bricks with their bare fists and lying on beds of nails in bizarre training footage.
The video shows the bare-chested soldiers performing brutal acrobatic fight scenes in front of the North Korean dictator and rows of delighted senior military officers.
The scene was part of a display put on by the North Korean army for the opening of a defence exhibition this week showcasing the nuclear-armed country's weapons.
The crazed soldiers punched their way through layers of concrete bricks, or smashed them with their heads.
Others were ferociously hammered on their arm or hand, and one lay on a bed of nails to have a block broken on his chest.
Another soldier smashed two glass bottles together, adding to a pile of shards on the ground.
In the footage aired by state broadcaster KCTV, the man is seen lying down on the debris as a comrade puts a thick concrete block on his chest, before smashing it with a sledgehammer.
A delighted Kim, dressed in a dark suit and pale blue tie, was seen grinning as he sat next to his sister and close advisor Kim Yo-Jong and watched the military's bizarre show of force.
Kim Jong-un grins watching North Korean troops smash breeze blocks & lie on a bed of NAILS in bizarre training video
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