BEN AFFLECK suddenly went flat-out batty, flatly refusing to let producers hire their own fitness trainer to whip him into rock-hard superhero shape for his role as the masked night-flying avenger in “Batman v Superman: Dawn of Justice” – Ben insisting instead on hiring a grunt ‘n groaner recommended by “Good Will Hunting” co-star/Boston bestie MATT DAMON.
“Turns out that was a truly bad decision for Ben,” reports an on-set source, “because when it finally came time to start filming after many delays, the star showed up looking so flabby for a shirtless boxing scene that producers immediately hired a ripped body double – and ended up using him so frequently as the Batman stand-in that snarky crew members sneakily started calling Ben ‘Fatman’ behind his back!”
