An amazing kung-fu kick by Roy Keane was the final straw for Sunderland players, it has been revealed.

The Sun says at half-time during one game this season, Keane asked one of his assistants to set up the tactics board while he disappeared into the toilet.

He returned to launch a kung-fu kick at the object, sending it flying into the wall of the dressing room.

He then called three different players a 'c***' and took a swipe at another one, only just missing his jaw.

The Black Cats men had got used to Keane losing his rag but this was the final straw for many.

It's also alleged that one top boss refused to send Keane a player on loan because he thought the whole situation under him at Sunderland was too unstable.