Mel Gibson will reportedly follow in Mike Tyson’s shoes — and make likeLes Grossman — and begin his campaign to remind us he is an actor, and not a heavy-breathing, baby-mama-threatening maniac, by making a cameo in The Hangover 2. Gibson will play a tattoo artist, hopefully one unhinged enough to soften audiences for his part as a guy with a hand puppet for a best friend. [Page Six/NYP]