I was driving home from work on the highway. The check engine light came on. I made a mental note to tell my son, who is a mechanic. The engine stalled out. I had enough momentum to take the exit from the highway and turn onto a side street before the car quit rolling. A helpful dog walker informed me that it wouldn't restart because it was on fire underneath. Luckily, superman drove by and put the fire out before the vehicle or even the engine were fully engulfed. My son & friend (also a mechanic) arrived and peered at the engine... their opinion was that oil on the catalytic converter started the fire. The car has been towed to their shop while I investigate my options.