New Orleans Saints tight end Jeremy Shockey (88) after Shockey fumbles the ball after he was hit by St. Louis Rams linebacker David Vobora (58) during the first quarter of an NFL football game in St. Louis. "The only thing I remember is coming out of the tunnel at the beginning of the game. And then _ a big gap," Vobora said about a concussion he got this season. "But I played the whole game, until the last series, when I started asking guys questions, and they looked at me like I was crazy." (AP Photo/Jeff Roberson, File)

Question: Have you ever had a concussion or serious head injury?