THE INJURY WAS CLIMBING BACKDOWN FROM SNOWPLOW SANDBOX TOWARDS CAB OF SNOWPLOW DRIVER DOOR, USING HANDRAILS AND STEPS, WHEN HE APPROACHED SNOW-PLOW CAB SIDE DOOR HE GRABBED PARTIALLY OPENED DOOR WINDOW. THE DOOR SUDDENLY SWUNG OPEN AND HIT THE INJURED IN THE RT. FOREHEAD CAUSING A SMALL ABRASION.