EE HAD JUST GOTTEN OFF THE SLOPE CAR AT THE TIME OF THIS INCIDENT. HE STATED THAT HE GOT OFF THE SLOPE CAR WITH HIS HAND FULL. WHEN HE STARTED TO SLIDE AND SLIP DOWN HE TRIED REACHING FOR THE SECOND SLOPE CAR AND TWISTED AND WRENCHED HIS BACK IN THE PROCESS. THERE WAS ICE ON THE SLOPE BOTTOM DUE TO THE EXTREMELY COLD WEATHER.