The popular KBS 2 TV entertainment program 'Superman Returns' Moon Jung Won got shocked after hearing that her son Lee Suh Joon is now potty trained.

On the upcoming episode of the popular KBS 2 TV entertainment program 'The Return of the Superman,' which will air on Dec. 27, 2015, Lee Hwi Jae babysat his twin sons Lee Suh Uhn and Lee Suh Joon. On this day's episode, Lee Hwi Jae gave an interview after he successfully potty trained his son Lee Suh Uhn. Lee Hwi Jae said, "My wife almost passed out when I told her the good news." In related news, the KBS 2 TV entertainment program 'Superman Returns' tells a story of Korean celebrity dads and their children. Actor Song Il Gook and his triplets Song Dae Han, Song Min Gook, and Song Man Sae, MMA fighter Choo Sung Hoon and Japanese top model Yano Shiho's daughter Choo Sarang and comedian Lee Hwi Jae and his twin sons Lee Suh Joon and Lee Suh Uhn star in the show. The KBS 2 TV entertainment program 'Superman Returns' airs every Sunday night.