In a video making headlines, while McGraw performed "Truck Yeah," an overzealous fan can be seen reaching out and grabbing Tim's pant leg – hard. In response, McGraw appears to slap back at her.
"At the end of the night during the encore, Tim was singing out in the audience and someone firmly grabbed onto his leg and wouldn't let go as he was moving through the crowd," a rep for McGraw tells PEOPLE Country.
"He instinctively swatted to try and keep them from ripping his jeans (which they succeeded at doing!), and so he could get to more fans who were trying to slap hands with him before the end of the show. He didn't know who had grabbed him and was simply trying to keep his pants from being torn."
Afterwards, McGraw appears visibly shaken and angry, and a security guard escorts the fan away from the stage area.