“The night shift workers were unusual characters. They ranged from relatively normal to bizarre. It was widely acknowledged within the group that most personalities were abnormal. It was consistent with the sleep deprivation they were subjected to. The winter nights were really long and the days were too short for sufficient restorative sleeping. I was hallucinating while driving atop Mauna Kea! Inside the telescope control room I could feel a presence and would go looking for the person I thought was in the control room with me. I never found them. The summit is a spiritual place according to the Hawaiians. I most certainly had an invisible friend up there!”