Anyone evr had a spark plug back out?

[94FormulaBird]

I'm half way between Summerville And Walterboro and I hear a horrible noise...sounds like exhaust leak from hell...pop hood and #8 plug is missing and wire is dangling...I did plugs last weekend and tightened them down pretty good with no anti seize....so I just pulled the injector connection off to keep fuel from spraying and drove the rest of the way...