NASCAR on Monday tried to figure out why Kyle Busch's HANS device cracked during a spectacular crash at Talladega Superspeedway. The frustrated driver, meanwhile, was trying to make sense of two hard wrecks that ruined his weekend. Busch wrecked in Saturday's Busch Series event, when he was hit from behind and his car ended up on its roof before rolling several times through the grass. His HANS device, a NASCAR-mandated head-and-neck restraint system, cracked in the accident.