Great Wall of Fall

The Great Wall of Fall is an obstacle, used as the fourth and final obstacle in the Summer Wipeout Zone of Season 4. It was interchanged with the Coin Toss from Spring for the rest of the season.

It is a 50-foot-long wall containing of several cylindrical pegs randomly retracting into the side that contestants must make their way across to the finish platform.

Only seven contestants cleared this obstacle on their first attempt with two of them from the same episode:

Christian Cannon (S4E17)
Tony Lee (S4E20)
Bryan Norman (S4E26)
Danielle Connolly (S4E28)
Jon Davis (S4E29)
Katie Davis (S4E29)
Brenton Kuipers (S4E30)

Coincidentally, six of them later won their respective episodes.

It was replaced by Iced Over in the next season.