We were driving down the freeway today at about 70 mph with a cross-wind of about 30 mph when we heard a metallic rattling/vibration sound a few times (lasted 5-10 seconds). We have had the vehicle since January and it has never done this before. When we got home I checked to see if there was anything obvious that was loose and couldn't find anything. The noise sounded like it was coming from the passenger side and slightly towards the rear. Any ideas? Has anyone else had this issue? If I take it to the dealer, do they have any way of replicating it without waiting for a windy day?