As you can sorta see from the picture, the piston has melted away and scored the cylinder wall from overheating.

I couldn't get a picture from the top as it was jacked up, which would better illustrate the damage. Well, the piston is no longer round, and will require replacing along with 3 others as the spark plugs exploded and blew porcaline into the chamber and damaged 2 other pistons.

Yow, talk about getting the "engine gremlins"