This should never happen. It just should never happen. My heart goes out to you.
RIP, beautiful Ark!
For those who asked, this was on FB:
Just a reminder to those with dogs that only know one speed... wide open-full throttle. Please take care when playing ball or Frisbee type games with them and try not to let things get out of hand. It only took a spit second, a bad bounce of the ball, and a jump into the air with a crash landing to end Arks life. It's a great responsibility we have on our shoulders, for they give us their hearts.