Many individuals have tube feeding implemented in the end stages of life. It is also common to have surrogates making life support decisions for others. When family members are placed in the role of decision-maker for an incompetent patient, what factors influence life support decisions? A case study and ethnomethodological inquiry provide an in-depth understanding of factors that influenced one daughter in her decision to have tube feeding implemented for her incompetent and severely debilitated mother. The decision was difficult and constituted a time of crisis. Unfortunately, the most influential factors in decision-making were: (a) urgency in the face of impending death, (b) lack of insight into the mother's values and preferences in relation to life support through tube feeding, (c) lack of knowledge over what tube feeding involved, and (d) the belief that tube feeding would not prolong her mother's life and suffering. Nine other, less influential, factors were also found. Improving the sensitivity of health care professionals to the agony of decision-making and to the decision-making process for life support are the major focuses of this paper.