EE WAS BRASING A CRACK IN A OIL PAN(TRANSMISSION) OF A EUCLID HAUL TRUCK # 352. THE PAN WAS DRAINED OF OIL AND CLEANED. EE WAS BRASING FOR ABOUT 2 MIN. WHEN HE STOPPED TO INSPECT HIS WORK. HE WAITED ABOUT 10 MIN. TO START BRASING AGAIN. WHEN HE LIT THE TORCH A FLASH FIRE BURNED HIS RT ARM, NECK AND RT SIDE OF FACE.