On a recent episode of MBC‘s Radio Star, TWICE‘s Sana told a shocking story about the time she swallowed her own vomit on stage.

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Sana explained that when she first debuted, she often ate kimbap before going up on stage to perform.

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But for the song, “OOH-AHH” there’s a choreography where the members bow down and form a human train.

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And this made for a bad combination when she was tired one day.

I was really tired that day so I couldn’t digest well. So I vomitted.

— Sana

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Luckily, it didn’t leave her mouth, so Sana swallowed it as she got back up because the show had to go on.

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Although the crisis was avoided thanks to her professionalism, Sana confessed that she’s now traumatized.

I can’t eat kimbap before my performances anymore.

— Sana

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This just goes to show that Sana is a true professional on stage.

But poor Sana!