This article is about a goal keeper who cant play soccer any more for a couple of months becasue one of the players in the team hit his head with his knee. Chech the goal keeper is in the Oxford hopital right now. He risks of having a second impact syndrome. This happens when there is swelling to the brain before it is recovered from an earlier injury.

http://web.ebscohost.com/src/detail?vid=19&hid=111&sid=0c9c2e38-fcc1-49aa-8a82-047b1954ab68%40sessionmgr102 (this is the article)