Tumble Tubes

&nbsp The Tumble Tubes is an obstacle that first appeared in the fourth episode of Season 1 as part of the Qualifier. For this obstacle, there are three cylinders laid long ways on a set of rails. The contestants have to stand on top of the first and roll it along the track to reach the second cylinder. They then step onto this one, and again move along to the last one which they can use to reach the next part of the course.