AN IGNITION OCCURRED ON THE 6 NORHT MAINS SECTION, MMU 088, MINING CROSSCUT (00) TO (000) APPROXIMATELY 75 FEET IN CUT AT 122 BLOCK. EMPLOYEE STATED HE SAW AN ORANGE/YELLOWISH FLAME TRAVEL FROM RIGHT TO LEFT SIDE OF HEAD, 8 TO 10 SECONDS DURATION. USED WASHDOWN HOSE TO EXTINGUISH. NO INJURIES OR DAMAGE.