They still should remember the lesson of that failure (that they have to protect the ball), but not dwell on the failure or they will do everything they can to not be in the position to even catch the ball so they will not get hurt.Failure is a big part of the educational process (http://www.simple-talk.com/blogs/2011/04/16/what-counts-for-a-dba-failure/) but failure can lead you in two ways and fear