Ugly scenes between the family of the teenager accused of kicking a security guard in the head at a youth festival and the victim's supporters have again erupted outside a Perth Court.

Martin Fulton, 18, was charged with assault occasioning bodily harm and trespassing after allegedly jumping the fence at the Good Life Festival on February 27 and kicking security guard Michael Rigby in the head as he was trying to restrain another man.

On Wednesday, Mr Fulton appeared without his lawyer at Perth Magistrates Court.

He was not required to enter a plea and his case was adjourned until May.