The Moose Test, also known as the Elk Test, is a Swedish handling test that makes sure a car is capable of safely evading a Moose, or Elk, that might suddenly find itself in the way of the car. While Moose and Elk might not be common problems in the good old US of A, we do have to deal with deer and cows, so this is still pertinent information.
The Jeep Grand Cherokee is obviously not quite up to the task of evading wayward wildlife and livestock, judging by this video. Scary stuff.
Chrysler is investigating the test results and said that the company's engineers were unable to reproduce the results of the test. Fan site AllPar claims that the test was rigged and used an overloaded vehicle.