I had an "almost fire" tonight. Maybe I am lazy but I wanted to save removing the tabs on a complicated cutout of several smaller pieces with 1/8" EM from 3/4" plywood and left the tabs away. Normally that works for me because the chips pack the narrow slot and hold the pieces in place. However, not tonight. The bit grabbed one of them and pulled it up to the collet. Now it started smoking in seconds and spewing little glowing embers into the dust collector.
Never happened before but fortunately I was nearby and noticed. I shut the machine down, dragged the dust collector bin outside and extinguished the smoldering bits. Whew....