Taiji Sawada/Nightmare Fuel

His descent into homelessness and addiction and worse.
Suffering from dying bone in a leg and hip. Osteonecrosis is High Octane Nightmare Fuel.
His apparent drug addiction, which has most recently led him to allegedly attack his girlfriend and try to kick a window out of a plane in flight.
His DEATH. Seriously, he went from fine to dead in the course of two days.