WATCH: A Sneak Peak of the Next 'Survivor: Redemption Island' Challenge

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The contestants will once again be tested with this unique challenge on the next "Survivor: Redemption Island."
The challenge is called Log Jam, and the goal is to try and shake your opponent off the log first.
Challenge Producer John Kirhoffer decides to test the challenge out himself. Will John be victorious?
Find out who wins this challenge when "Survivor" airs Wednesday night on CBS.