I was at the Forest Preserves one time with my GF and an old couple were trying to get their car started. It would sputter, run really rough for a second then die. I saw the guy had been backed into a spot by a hill and looked at his exhaust. It was plugged with dirt and clay. I told him to wait a minute and used my knife to cut the stuff out.
Of course he tried to start the car while I was doing this and blew the rest of the junk in my face. Thanks old man. Car ran fine after this and he and his lady friend drove off into the sunset.
Such a nice guy, Cliff.