Why the Proteas choke, according to a psychologist

http://www.health24.com/news/Columnists/1-4618-4641,62031.asp

The more you tell sportsmen not to choke, the more likely they are to do it. The more they are lured in interviews to insist that they will not choke, the more likely it becomes. Thinking you (or "we") may have lost control, loses control. It's not the same as panic - in a panic you have no idea what to do. In choking you know exactly what to do, and have often done it before - you just don't do it.