TRAVELLING CU of snowmobilers during run. TRAVELLING ZOOM INS and ZOOM OUTS of snowmobiler and snowmobile during run on snow-covered road. Front MS of snowmobiler moving on very rough trail. MLS of snowmobile being driven in tight circles. FOLLOW SHOT of snowmobile moving in woods, breaking out into clearing. Front shot of other snowmobile on trail, head and shoulder of driver in immediate foreground. Rough, shaky shots of snowmobilers and their machines on frozen river, along trail.