Best not to slide sideways down a snowy bank into a Douglas-fir next time you're out romping in the Grand Cherokee, according to the Insurance Institute for Highway Safety. As the clip above from Good Morning America shows, new models of the Jeep, Chevy Trailblazer and both the Nissan Pathfinder and Xterra faired poorly in 31 mph side-impact tests. Interestingly, when equipped with optional side air bags, both Nissan models received top marks, as did the Toyota 4Runner. In other news, water is wet.