More great analysis by tribephyl!

THANKS for that Twitter photo of Missy!

As Georgana pointed out we know Jeff attending to Missy is during the Immunity Challenge since he is wearing a different outfit/hat at the Reward Challenge

Jeff at Reward Challenge

Jeff at Immunity Challenge

Jeff tending to Missy

Jeff's EW.com Tease is:

"Ah, next week holds a special place in my heart because we have a challenge that was created and designed by a very special challenge producer. Austin Russell is a thirteen year old from Texas who made a visit to location through our friends at Make A Wish. His big dream was to contribute a challenge that would end up getting used on the show and boy did he deliver! Not only is it a cool challenge involving a huge teeter-totter and buckets of water, but it ends up creating unexpected reality on the show. That is always the hope of a challenge — that it changes the game in some way. This is definitely game changing for one player. Read into that whatever you want: It’s gonna be fun!"

At first I was thinking that maybe Missy slightly injures her LEFT ankle in the RC and injures it further in the IC but would Jeff says It’s gonna be fun! if someone got injured?

So again, here is the RC:

In Teams of 3:
Yellow: Baylor, Jaclyn, Natalie
Blue: Missy, Jon, Keith

1) Climb through pile of Hay
2) Over and Under obstacle (where Missy falls on her upper torso in Next Time)
3) Fill Bucket from Trough
4) Take Bucket over Huge Teeter Totter
5) Fill Bucket on end of Balance Pole with water
(ramp? to reach bucket?)
Repeat steps 4 & 5 until Balance Pole tips and opens Gate
6) Go through Gate to Puzzle(?) Table
7) Complete Puzzle

Not sure how this Reward Challenge accomplishes

hope of a challenge — that it changes the game in some way. This is definitely game changing for one player

Such that Jeff says It’s gonna be fun!