"Physical: 100" contestant Yun Sung Bin gave his thoughts about the bizarre move he did in one of the challenges.

Before hailing the winner of the game, 100 participants, who are the best of the best in the field of sports, fitness, military, and more gathered to survive a grueling reality competition.

The participants have to endure numerous challenges to see who among them deserved the title and a whopping 300 million KRW or 245,000 USD.

Interestingly, Yun Sung Bin caught the viewers' attention after leading the challenge in episode 6.

Yun Sung Bin Calls His Waist Strategy 'Stupid'

In quest 4, Ma Sun Ho failed to secure a spot after he struggled to continue during the "The Punishment of Sisyphus."

On the said challenge, participants have to roll a heavy boulder into the slope as long as they could and the last man standing wins the round.

After Ma Sun Ho, the legendary MMA fighter couldn't advance to the next round and the game is up to Yun Sung Bin and processional cyclist Jung Hae Min.

If one of them wins, he will join mountain rescuer Kim Min Cheol, National Team Luger Park Jin Young, and Jo Jin Hyeong in the final quest.

READ MORE: THIS 'Physical: 100' Cast Won First in All Challenges

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Written by Geca Wills