Chairman David Sullivan was left shaken after being besieged by supporters outside the Hawthorns during this afternoon's FA Cup humiliation.

Even Sullivan walked out early. Just seen him outside the ground pic.twitter.com/XXEkvNRcIW -- Abi Meek (@abimeekx) February 14, 2015



The co-owner, West Ham's sole representative at this afternoon's match left the ground shortly before the end of the game, which the Hammers lost 4-0.As he made his way to his car, Sullivan was approached by a group of angry fans demanding the dismissal of manager Sam Allardyce.Despite the 66-year-old's initial attempts to appeal to the group, an offensive comment was made which clearly angered Sullivan, who was led away to his car as the group continued to shout.The following video was posted on Twitter by @abimeekx. It contains language some may find offensive.