"Derek wanted to punch the sorry rig that was leaving the scene of the crash as it stalled and almost didn't make it. But after some sputtering, it began its journey to the hospital where the victims could be treated.
He walked back to his car and climbed in, pulling the seat belt over him and snapping it into place before starting the engine. As he began to ease off of the brakes, a red semi thundered past him. Derek cursed under his breath at the negligent driver, but took another breath and headed back towards home.
****** How a stalled Ambulance Saved Derek Shepherd's Life*****
If you look on the extras from season 11, you will find footage of the ambulance leaving the scene and stalling. Why not use it to our advantage here?