November 1987 in a 77 Honda Civic that had never before been outside of southern California and never above about 5,000 feet in beautiful wx. But this time it was Interstate 70 eastbound through Colorado in a humid snowstorm, climbing through about 9,000 feet on the way toward the Eisenhower tunnel. The engine ran rough for a minute or so, then quit. No restart possible. Hitched a ride to the tunnel and called tow truck. By the time the truck arrived at the tunnel and we worked our way back down to the car, the carb ice had melted and the thing started without a problem. Still didn't dawn on me that it was carb ice. It was only after running into the same problem two or three times the following spring in conditions conducive to aircraft carb ice that it dawned on me. Felt pretty stupid...
Dave