Excruciating mobile phone footage captured the skater rolling around on the floor screaming in agony after he stumbled while attempting to grind down a step railing.

The video shows the man accidentally dismount from his board and land on one leg which leaves him unable to move on the ground.

A sickening thud can be heard as the skater makes impacts with the concrete in front of horrified friends.

He is seen crying with pain with one leg crossed over the other at an horrendous angle.

The skater was trying to grind down a step rail
The man is seen screaming with his leg at an horrendous angle

The footage was uploaded to LiveLeak today and is believed to have happened in Mexico.

In the minute-long clip, friends are seen clutching their heads and checking on him before running off to retrieve his skateboard.

The man is heard screaming with agony
The stomach-churning clip showed the podgy novice smiling nervously as his friend pushed him towards the edge of the small drop.

But the board almost instantly slid from under his feet, and his left foot landed awkwardly on the ground behind him.

His ankle wa seen dangling limply at an horrendous angle as he howled in agony.