can i ask you a couple of questions about concussions? >> sure. >> larry: west virginia has a major football team, it's a major problem in the informal, now in college football and other sports. morneau of the twins sat out almost the entire year. what is a concussion, what causes it? >> well concussion is either the head gets hit or maybe the head gets moved back and forth violently such as the brain moves inside the skull. and our brain floats in this bath of sir cerebral spinal fluid and most of the time it recovered. there's also maybe a genetic predisposition. it can lead to long-term problems in a minority of players. >> larry: could a problem be in the helmet.