Working with Sofia Vergara on their comedy "Hot Pursuit" landed Reese Witherspoon in the emergency room.

During an appearance on Monday's "Ellen DeGeneres Show," Vergara admitted that she got a little carried away during one of her fight scenes with Witherspoon. "I sent her to the emergency room," the 42-year-old Modern Family star said proudly. "Something with internal bleeding."

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After playing coy about the "secret" injury, Witherspoon elaborated, "I thought my appendix had burst."

Vergara further explained what went down during their on-screen altercation, and sort of implied it was her co-star's fault. "I pushed her and I pushed her and I kept telling her I think I'm pushing you too hard and she was like 'No, do it real,'" she recalled. 

The 39-year-old Oscar winner corroborated her co-star's story, adding, "I was like, 'Push me hard!'"

That's when it happened. "I was like this in the sofa," Vergara demonstrated, "and I popped her ovary." 

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When Ellen asked Witherspoon to confirm the story, she quipped, "It's clearly something that happens in Colombia... I don't know what happened."