In Philip K. Dick's novel "Choose," the protagonist Horselover Fat experiences a significant mental crisis triggered by a phone call from Gloria. She inquires about Nembutals, which leads Fat into a downward spiral of anxiety and confusion. This moment marks the beginning of his struggles with reality and his own psyche, highlighting the fragility of the human mind when confronted with distressing circumstances.

The story explores themes of identity, mental health, and the impact of external pressures on an individual. Fat's journey into a nervous breakdown reflects the complexities of modern life and the search for meaning amidst chaos. Through his experiences, the narrative invites readers to contemplate the boundaries between sanity and madness, and the ways in which individuals cope with overwhelming situations.