A 33-year-old Pennsylvania man was killed leaving Jason Aldean's Montage Mountain concert on Sunday night. Michael Sanders was hit by a Jeep driven by Ivy Giordano, 22. He died 40 minutes later at a local hospital. Giordano was arrested on suspicion of driving under the influence. The accident backed up traffic for hours, forcing many concertgoers to abandon their cars and walk down the mountain to shuttles below. WNEP-TV reports the last cars didn't leave the venue until 3 a.m. Monday morning.