Thanks for posting this. I had the same issue in the back passenger side cylinder. The plug gap was at .000. I was worried too, but just replaced the plugs and drove it. It wasn't making any noise and ran fine afterwards. I have since beat the snot out of my car for like 15,000 miles and the plug is fine. I seriously doubt the piston actually hit the plug, it probably was debris in both of our cases. That plug does look pretty damn fouled though, let your tuner take a look at it.