Heartbreaking Incident Highlights Potential Dangers of Energy Drinks and Gym Safety Measures. In a tragic turn of events, 18-year-old Oklahoma high schooler, Zach Doran, a “super healthy” athlete with no known heart issues, died after collapsing during a Mixed Martial Arts (MMA) training session. The incident has raised serious concerns over the safety of energy drinks, which Zach regularly consumed before exercise.