HI Robbie
In the case of Stanley Baker. If I remember right in one scene he hesitates to kill a guard and someone steps in and does it for him.
If you are a trained killer as he was and suddenly decides that he doesn't want to be a trained killer anymore as he did, then your heart nor head isin't, and concentration and of more importance, the edge goes. I think this is what happened to Stanley Baker, and also perhaps a death wish as a way of release from what he was expected to do.
Regards
Arthur
