A tattoo is like a first impression: It better be right, or you may regret it. "Tattoo Nightmares" is about the bad experiences -- the downright ugly, embarrassing or hilarious inkings. Those people seek help from the best cover-up tattooists and go under the needle again to see if their nightmare can be altered to something dreamy. Re-enactments depict how they wound up with awful "art." Warnings: Always hire a true professional for body modification. And think before you ink!