This study analyzed the effects of social stories in reducing precursors to tantrum behavior in two social environments, morning work time and lunchtime. The student was a 12-year-old boy diagnosed with autism, Fragile X syndrome, and intermittent explosive disorder. Using an ABAB design, two social stories were implemented and withdrawn as data were collected to determine the frequency of two behaviors, inappropriate vocalizations and dropping to the floor, which served as precursors to tantrum behavior. The data revealed a decrease in precursors to tantrum behavior when the social stories were available to the student and an increase in targeted behavior when the intervention was withdrawn.