The Ring Swing was the 2nd obstacle in Oklahoma City in American Ninja Warrior 8. Competitors would have to grab a ring, swing it to a post halfway across the water, and hook it onto the post. Then they'd transition to the second ring, hop it over the post, and swing to the landing platform. The majority of competitors got through it, though some had to swing twice.
In City Finals, the second ring's chain was modified so it would only swing halfway to the landing platform, making the dismount a tougher element of the obstacle. This obstacle also bears similarity to Circle Cross.
Giant Ring Swing
The Ring Swing returned even bigger (officially the Giant Ring Swing) in Stage 2, as the first obstacle. Competitors start 30 feet on an elevated platform and swing 15 feet to hook the first ring. Next they must reach for another ring a few feet away. This ring has no chains and instead must be jumped to a third hook five feet away. Then, grab a third ring, a few feet away again, and unhook it to swing 15 feet and grab a lache bar. There are three bars that must be swung from to complete the obstacle which served as a medium for the Down Up Salmon Ladder.