LAST EDITED ON 12-04-15 AT 08:24 PM (EST)

Thanks for posting that promo and the thoughts, G. Clearly, the format of the challenge is Troubled Waters, Ozzy won, and Chris won. I know at the end of the game, the challenges tend to get far harder, and more physical. This seems like the Troubled Waters Challenge has added another section. Not only must they run the gambit 3 times to retrieve numerous keys/flags(?), they then have to use most likely keys to unlock bags with puzzle pieces of some kind. You can see the stations behind them as they run the water course.

These are all the START of the challenge, on Jiffy's GO....

They are all there and Kimmi and Abi take up the rear...

We see Jiffy, at the end of his floating platform. What we DON'T know is how many times they have to go out and retrieve a key/flag? It could be one time or multiple times. But, we do know that despite what position they end in after retrieving the keys/flags, they still must complete a puzzle of some kind at their final station. I think Kelley and Spencer are working on their separate puzzles in corrals adjacent to each other, they are NOT working together, when we hear Jiffy call out that Tasha's in trouble and they turn around. I think Kimmi is just coming to the beach with her final bag when Tasha gets in trouble, and we see her turn around also.

So, Spencer and Kelley, and most likely Jeremy are all working on their puzzle at the point in time when Tasha gets into trouble.