Zac Efron Poor Zac Efron - someone's really shaken him up in Blighty.

And as much as we're fans of the Zac man, we promise it ain't us either.

Oh no, this is way more serious.

According to the Daily Mail, Zac and girlfriend Vanessa Hudgens were leaving a performance of Josh Hartnett's Rain Man in London's West End, when a fan decided to show Zac some unwelcome love.

The fan, a middle-aged man, apparently started shouting and pointing at Zac.

Reports say he then lunged forward and tried to grab Zac's hair.

An onlooker is quoted as saying: "Some guy was just stood near the door where Zac and Vanessa emerged.

"He just reached over and grabbed the side of Zac's head. There was no provocation. It all turned into a bit of a mess.

"He was shouting all kinds of things at Zac. Their security team eventually dealt with it. They had to bundle Zac into a car, but at one point it looked as though the man was going to be pushed into it with him."

Oh dear, we hope this doesn't put Zac off visiting (us) again.