The cast members of "Flex X Cop 2" showed off their hidden talents.

On the August 2 broadcast of SBS "Running Man", the cast members of the drama "Flex X Cop 2" joined the members for an "Undercover Chaebol vs. Detective" race.

During the broadcast, the stars of "Flex X Cop 2" appeared to take on the race alongside the "Running Man" cast.

Regarding Jung Eun-chae making her first appearance on a terrestrial variety show, Jee Seokjin playfully remarked, "I was upset you haven't appeared on shows until now. Try to adapt well. Just trust me." In response, Yu Jae-seok scolded him by saying, "Hyung, at least earn your keep before you talk," drawing laughter.

Kang Sang-jun, who shared that he doesn't particularly like soccer, and Kim Shin-bi, who also mentioned he isn't a big fan of soccer but is from Anyang, received a contrasting welcome from Kim Jong-kook.

Afterward, Ahn Bo-hyun hyped up Kang Sang-jun and Kim Shin-bi, mentioning they had prepared something special for the day. Kim Shin-bi, who revealed he was in a dance crew back in his school days, went first and showed off some b-boying. However, unlike his fuss before showing off his talent, his b-boying turned out to be rather frantic and messy, drawing teasing remarks from the "Running Man" cast.

Next, Kang Sang-jun surprised everyone by announcing he had prepared a rap performance. Revealing that he used to be a rapper under the name Deep Black, he also caught attention by sharing that he is the husband of "Miss Trot 4" winner Lee Sona.

However, Kang Sang-jun, trying to rap for the first time in 10 years, delivered a performance full of sheer grit rather than skill. In response, the "Running Man" cast joked, "Deep Black cannot go with us," sending everyone into laughter.