EE WAS CLIMBING DONW OFF OF THE LUBE TRUCK AND GRABBED THE RAIL WITH HIS LEFT HAND. WHEN HE WENT TO GRAB THE NIPPLE OF THE GREASE TANK WITH HIS RIGHT HAND HE MISSED HIS POINT OF CONTACT AND FE LL BACKWARDS LOSING HIS GRIP AND FALLING APPROX.FT TO THE GROUND LANDING ON HIS RIGHT ARM AND CAUSING A FRACTURE ABOVE THE WRIST.