Each castaway must stand on a small block on only one foot while stabilizing a ball against an overhanging piece of wood. If at any point they lose their concentration or their balance, the ball will drop and they are out of the challenge. The last person left standing wins.
The challenge was first used as the final seven Reward Challenge in its first appearance in San Juan del Sur. It ultimately came down to Jaclyn Schultz and Natalie Anderson, with Natalie outlasting Jaclyn to win reward.
The challenge appeared as the final ten Immunity Challenge in Cambodia. Before the challenge started, host Jeff Probst offered to have the Orkun tribe's shelter rebuilt by Production if at least five people sat out of the challenge. Everyone but Joe Anglim and Keith Nale elected to sit out to have a new shelter. Joe then outlasted Keith to win his fourth individual immunity in a row.
The was used as the final eight Immunity Challenge in Island of the Idols. Ultimately, the challenge came down to Elaine Stott and Lauren Beck. After nearly 15 minutes, Lauren began to visibly struggle, but Elaine suddenly dropped, granting Lauren individual immunity.
|San Juan del Sur
"Still Holdin' On"
"Like Selling Your Soul to the Devil"
|Island of the Idols
"A Very Simple Plan"
- Keith Nale is the only player to compete in this challenge twice. He lost both times.