[christianchevell]

Appears you should get a cheap scope camera from harbor freight and suck that cylinder clean with a shop vac and small fitting then blow like crazy with compressed air and visually inspect . Hopefully nothing has been hurt much and you can go motoring with a new plug, and its a broken plug...it happens, and you should keep a eye on that cylinder but the exhaust may have cleared out crap to stick in the cats... a little porcelain and steel... Many threads on here about guys breaking one plug doing the headers....LOL