2004 Ford Explorer cruise control problems

While driving vehicle suddenly started accelerating uncontrollably. Driver applied the brakes and the pedal went to the floor. Vehicle continued to accelerate excessively. While making a right turn driver hit the curb and flipped four times landing upside down in a ditch. Driver and passenger sustained injuries, and were transported by an ambulance to a hospital. Vehicle was towed and totaled by the insurance company.

I have discovered that my 2004 ford limited v8 cruise control can kill the engine while the car is in motion. I have been using the coast button on my cruise control to reduce speed as I approach a speed sign lower than my existing speed. If I hold the button as the car slows to a speed below 35MPH (approximate) the engine quits leaving me with no power steering or vacuum braking. I've tried it several time and the fault is consistent.