CONT MINER WAS CUTTING COAL ON #1 UNIT #2 ENTRY. HE HAD MADE A 20' CUT ON LEFT & RIGHT SIDES. CUT A 12' ON RIGHT AND HAD THE LEFT OUT UP TO ABOUT 6 FT OF THE SQUARE OFF. OPERATOR, RAM CAR DRIVER AND BOLTER SAW AN ORANGE GLOW UNDER THE HEAD IN THE PAN. THIS LASTED 1-3 SECONDS & DISAPATED. FIRST CUT OF A SET OF ROOMS INTAKE SIDE WHICH HAD BEEN DRIVEN IN ON ENTRY ADVANCEMENT.