Centrifugal Farce

I was reminded, after reading [21 Quest]'s Auto Fetch idea, of a concept, (which didn't win), that I had submitted to the Idea Fetch contest.

Picture a 10" diameter plastic hoop with about an inch and a half wide, hollow cross section.
Into this hollow is inserted a motion activated, inch wide, cylindrical shuttle and battery, with drive wheels around its circumference and the hatch is secured. Over this is stretched a rawhide cover, or a tasseled one if you are a cat person.
I am both myself...but I digress.

Your dog saunters over, unimpressed by your latest attempt to win back his favor after leaving him alone in the back yard day after day for years.
With a look of disdain he bites down on this new chew toy and suddenly drops it, barking like mad.
His bite has activated the shuttle which begins to zip around the interior of the hoop causing it to oscillate wildly on the floor, until the shuttle has gained enough momentum to tilt the hoop on end and race through the room, followed closely by Fido, where it careens off of the side of the coffee table to launch across the back of the sofa, then crosses the hallway and into the kitchen before Fido gets his jaws around it again.

The first impact with the coffee table had deactivated the shuttle drive motor and only inertia kept it moving from that point on but now that Fido is getting a taste...his bite has activated the shuttle which begins to zi...