Tumble Tubes

The Tumble Tubes are an obstacle, used as the first obstacle in the Qualifier during episodes 4 and 10 of Season 1.

Contestants must balance on three rolling tubes across to the other side.

Only five contestants cleared this obstacle with four of them from the same episode:

Phillip Ventimiglia (S1E4)
Brent Williams (S1E10)
Jessie Graff (S1E10)
Sam Mohan (S1E10)
Phil Somerville (S1E10)