What exactly happened? Are the threads stripped in cylinder 1 where the sparkplug was? Or did the sparkplug just come apart... you know, like did the porcilin(sp) pop off of the thread and electrode?

My car did that (plug somehow seperated and blew apart one of my MSD wires), thus leaving the threads and electrode down in the motor... it was a easy fix... just popped a socket down there, loosened it, and used a magnet and pulled it out.