What do the G4 gagmen do on 'Happy Together 3' while on standby?

A behind-the-scenes photo of the G4 comedians on standby during KBS 2TV's 'Happy Together 3' was revealed by one of its members.

Comedian Choi Hyo Jong uploaded the above photo onto his Twitter and wrote, "The G4 members are usually on standby for a long time in the back of the sauna room."

The three G4 members (Heo Kyung Hwan, Jung Bum Kyun, and Kim Won Ho) are seen playing what seems to be the "zero game", which involves numbers and thumbs, as they wait to be introduced on the show.

Followers who came across the photo commented, "I didn't know that they'd have to wait for that long," "I thought they would be practicing their gags, but I guess not," "They must be on standby for a long time," and more.

Source: Choi Hyo Jong's Twitter