Freud proceeds to look for "evidence, for the existence of hitherto unsuspected forces 'beyond' the pleasure principle."[1] He found exceptions to the universal power of the pleasure principle—"situations ... with which the pleasure principle cannot cope adequately"[10]—in four main areas: children's games, as exemplified in his grandson's famous "fort-da" game; "the recurrent dreams of war neurotics ...; the pattern of self-injuring behaviour that can be traced through the lives of certain people ["fate neurosis"]; the tendency of many patients in psycho-analysis to act out over and over again unpleasant experiences of their childhood."[11]