“It: Chapter Two” may be one of the most blood-filled horror movies of all time.

In an article about the film at Vanity Fair, Jessica Chastain discussed a scene in which her character is tortured by Pennywise, who locks her in a bathroom and begins filling it with blood.

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The actress told reporters at a press conference the film used a “record-breaking” 4,500 gallons of fake blood — the majority used for that single scene.

“It was really disgusting,” Chastain said. “It’s like slime, and it was up my nose, in my ears, and stuck on my eyeballs. I kind of did have some little fears but I was happy to do it.”

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Unfortunately for Chastain, the horror of the fake blood wasn’t over when she finished shooting the scene. For continuity’s sake, she had to remain drenched in the stuff for the rest of filming.

“I admit that was the only miserable part. Andy had me dressed in blood for the whole end of the film,” she said. “Before every take, they had a small kiddie pool filled with the cold blood, and [they’d] pour it on me.”

“It: Chapter Two” hits theatres September 6.