Stone explains dumb Damon puppet

Matt Stone has finally explained why Matt Damon's puppet in recent marionette movie Team America: World Police looks "retarded" - it was accidental.

Stone, who made the satirical film with his South Park partner Trey Parker, was surprised when Damon's puppet came out of the oven looking nothing like they were expecting him to.

He says: "When we looked at the plans for his head he looked good, but when we came out of the oven he just looked retarded. I think it was well thought out.

"Honestly, I think Matt Damon is one of the better actors around. I think he's a pretty great actor. He's pretty talented. And for no real reason, he is retarded in this movie."