Machine Gun Kelly got into a physical confrontation with fan at Louder Than Life festival this weekend – see footage from the incident below.The rapper turned pop punker headlined the Louisville, Kentucky festival yesterday (September 25), however footage from the metal-leaning event appears to show that not everyone was happy with his top billing, with some of the crowd booing and flipping him off.Elsewhere during his performance, MGK was confronted by two fans who jumped the front barricade