This looks like Sandstone Canyon. I couldn't imagine taking a Hummer that deep into SSC.
http://s78.photobucket.com/albums/j109/JDEORTA/ANZA/?action=view¤t=MOV01831.flv
http://s78.photobucket.com/albums/j109/JDEORTA/ANZA/?action=view¤t=MOV01831.flv