Explaining on Instagram: "Jim Carrey’s portrayal of The Grinch is one of the most physically demanding comedy performances ever put on film. 🎄😬 For the 2000 movie, Carrey spent hours each day in heavy prosthetics and makeup, which he described as pure torture. He even trained with a CIA torture-resistance specialist to cope with the discomfort. Despite that, he delivered a performance packed with facial control, body language, and nonstop energy that completely defined the character. 🎭 His ve