Christian suffered a knee injury at last night's Smackdown house show from Forest National in Brussels, Belgium.
Christian was in a bout with Sheamus when he was hurt less than two minutes in the match. The referee called for a quick finish, Sheamus hit the Brogue Kick and threw up the X sign. Assistance was given and Christian was helped out of the ring.
As of this writing, I do not know the severity of the injury.