A racist thug has been jailed for knocking out a stranger by throwing a pool ball into his head after a row in a pub.
Drunken yob Ross Luscombe, aged 27, struck the man from behind as he walked away from the confrontation, a court heard.
He was knocked out for 30 seconds to a minute and left with a lump to the back of the head.
Luscombe, who has mental health difficulties, had earlier punched another man who had dared to ask him directions, Plymouth Crown Court heard.
Jailing him for 44...
