Kim Ji-won Biting Her Nails Before Yu Quiz and Recreating a 2017 Drama Line

Kim Ji-won admitted she was so nervous ahead of her appearance on Yu Quiz on the Block that she kept jolting awake the night before, biting her nails and shaking her legs in the dark. For an actress best known for playing composed, intensely drawn characters, it was the kind of candid confession that makes a pre-release clip worth watching twice.

The moment came from a preview and pre-release footage tvN dropped ahead of episode 363, marking Kim Ji-won's first-ever solo appearance on a variety program. The clips circulated quickly among fans who had long wondered what she would be like outside a scripted role.

The nervousness that made everyone like her more

Kim Ji-won's self-description of her pre-show anxiety landed well precisely because it was specific: not a polished "I was a little nervous" but a full physical account of lying down, sitting back up, chewing her nails, and bouncing her leg. Host Yoo Jae-suk, who has a gift for letting guests relax into their own stories, gave her room to tell it.

She also used the appearance to share a warm story about Yoo Jae-suk himself, framing it as adding "one more to the million-and-one kind gestures" she already associated with him. The anecdote involved an old penalty game: she recalled that Yoo Jae-suk had once used his teeth to tear open gift wrapping paper on her behalf so she could avoid a penalty. Yoo Jae-suk's response, "I'm genuinely surprised that counts as a kind gesture", brought down the room.

The line that stopped the set

The segment that generated the most visible crew reaction came when Yoo Jae-suk asked Kim Ji-won to recreate a famous line from the 2017 KBS2 drama Fight My Way. She delivered it deadpan and without hesitation, the kind of performance that reads as effortless only because the comedic timing underneath it is precise.

Yoo Jae-suk caught the lighting director and camera director mid-reaction, both wearing the same quietly delighted expression, and immediately mimicked their faces for the camera. The broadcast added the subtitles "warm" and "benevolent" over the two directors' faces, which turned the whole moment into a three-way bit. It is exactly the kind of unscripted detail that variety producers hope for and can't manufacture.

Off-camera and unguarded

Beyond the performance highlights, Kim Ji-won offered a small window into her actual daily life. After work, she said, she goes straight to the sofa. She also described herself as someone who tends to bottle things up internally, a detail that surprised viewers who had mostly seen her channel that quality into dramatically tense characters rather than mention it plainly in conversation.

The full episode airs on October 7 at 8:45 p.m. KST on tvN, alongside segments featuring baseball prospect Ha Hyun-seung and Asian Games gold medalists. Based on the preview alone, Kim Ji-won's portion looks like the most genuinely surprising television she has done in a while.