Impending death, symptoms, loss of control and autonomy, ignorance, isolation and uncertainty constituted the basis for powerlessness and helplessness, but each factor was reinforced by the occurrence of suddenness, high intensity and/or lengthiness. In total, 65% reported definite experiences of powerlessness and helplessness. These feelings also held a deeper meaning, involving aspects such as existential loneliness and hopelessness. They were ultimately caused by an incapacity to control feelings and cope with the situation related to the impending death. The results are discussed in relation to Cassel's theory of suffering and existential psychology.