Lee Jae-hoon

Jiwhaza, also known as Burst! Mental concentration, is South Korean game show known mainly for its oddball humor. It was broadcast in 90-minute episodes on Seoul Broadcasting System every Saturday from April 14, 2007, to September 15, 2007. The show was hosted by the SBS announcer Choi Gwi-hwan and had two teams of celebrity contestants, each captained by regulars Yoo Hyun Young and Kim Yong Man. It was divided into a series of loosely-scripted challenges; the team with the winning final score would take "Jeongshin Tongil gwan" for that episode. A regular segment on the show was "the wall", an adaptation of the Brain Wall from the Japanese Tunnels game show. The segment had a moving wall advancing on a contestant standing at the edge of a pool of water. To avoid being knocked into the pool, he or she was to jump, dodge or otherwise pass through a hole in the wall. Some of the more difficult walls required acrobatic skill to pass and used humorous cutouts of ballet poses, flying kicks and handstands. Another regular segment was the "earthquake room", in which contestants on a padded platform were each given a pile of cushions. They were then asked to solve a series of visual puzzles, but could only give their answer while kneeling on a complete pile of cushions. This often resulted in tumblehouse slapstick because of the rocking motion of the platform and constant fighting over cushions; foam rocks were also thrown at the contestants and the platform tilted violently whenever a wrong answer was given.

Celebrity guests are split into two teams to compete in various contests. One guest, known only to himself, is designated the "X-Man", and does his best to cause his team to lose the contests. At the end, all guests try to determine the X-Man's identity.

Les présentateurs de l'émission sont au nombre de 7, ils affrontent seul ou ensemble les invités afin de gagner la « course finale » et de gagner des « Running Ball ». Ces dernières sont utiles pour éviter tout genre de punitions qui varient selon les épisodes. Les présentateurs sont la plupart du temps mélangés avec les invités pour rendre les défis plus équitables étant donné que les présentateurs connaissent déjà à l'avance certains jeux contrairement aux invités.

Infinite Challenge has been reported as the first "Real-Variety" show in Korean television history. The program is largely unscripted, and follows a similar format of challenge-based Reality Television programs, familiar to the audiences in the West, but the challenges are often silly, absurd, or impossible to achieve, so the program takes on the aspect of a satirical comedy variety show, rather than a more standard reality or contest program. In order to achieve its comedic purposes its 6 hosts and staff continuously proclaim, the elements of this show are the 3-Ds, Dirty, Dangerous, and Difficult.