Part of the requirement to pass the second stage is doing summersault rolls on a hardwood floor.
From the toledoblade.com
These same cells are found in the mechanisms hydra use to grasp prey, and to summersault through the water.
From the sciencedaily.com
He then teleported to a lake surrounded by Japanese maples and did a summersault from a cliff with an animated Buddha nearby.
From the washingtonpost.com
The titanic blast causes a 37,000-pound armored vehicle, its four original occupants still contained within, to do a complete summersault.
From the timesunion.com
This is the same DeSean Jackson who once tried to summersault for a touchdown in a high school all-star game and splashed down at the one.
From the jsonline.com
More examples
Somersault: an acrobatic feat in which the feet roll over the head (either forward or backward) and return
Summersault was a Canadian music festival organized by the band Our Lady Peace in 1998 and again in 2000. Summersault 1998 was held in Barrie, Ontario, at Molson Park, St. John's, NL and Shediac, NB while Summersault 2000 toured to eight Canadian cities.
Summersault was a music festival put on by promoter Steve Pavlovic that toured Australia in the summer of 1995/1996.