MBC "Infinite Challenge" Park Myung Soo gave the audience another reason to laugh as he didn't understand yet another one of their games' rules. 

On the Saturday episode of "Infinite Challenge," they continued the second part of their ongoing theme 'As You Say It.' Last week's Russian Roulette game assigned each member to a bus. The bus has 7 blanks on its side and when it's complete, the members will receive punishment just as the sentence 'says it.'

When a bus stops at designated stops, each member can fill the blanks for either their own or another member's bus. Every member has one 'Joker' card that allows them to nullify the former mission. Joker allows the member to write whatever they want and stick it on the side of the bus. 

The situation was that Park Myung Soo just completed Yoo Jae Suk's mission for him and he decided to use his joker. But not understanding the rules, he literally wrote in 'Joker' to the side of his bus. So as the members started to say joker, he was punished.

The members, flabbergasted by the twist, all laughed and congratulated him on putting his neck on the line for creating laughs.