Jim Carey's experience on the set of How the Grinch Stole Christmas was so intense that he needed professional help from a military endurance trainer.

When Carey's classic Christmas film, How the Grinch Stole Christmas , comes to mind, most people don't associate the family-friendly movie with torment. However, what went on behind the scenes was far darker than anyone could have imagined. In an interview with Vulture , Carey, along with director Ron Howard, producer Brian Grazer, and makeup artist Rick Baker, revealed how the actor had a rough time during filming and nearly quit.

Baker told the publication that Carey was a method actor. So, portraying a character as bitter as the Grinch took a toll on him. However, what really pushed him over the edge was on the first day

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