The Sonic Swing is an obstacle, firstly introduced as the first obstacle on every season of Team Ninja Warrior (including its rebranded as American Ninja Warrior: Ninja vs. Ninja).
Competitors have to run full speed across four angled steps (which increase in height), arranged in a straight line, and then grab the rope to swing to the platform (in a similar fashion with the Sonic Curve, except the steps were not positioned in a curve). Then, they must grab another rope to swing to the next platform to advance.
Since Team Ninja Warrior is a competition where competitors compete each other in a side-to-side course, several competitors made a mental mistake by grabbing the rope too low and having not enough momentum to swing to the platform.
On American Ninja Warrior: Ninja vs. Ninja, with modifications all throughout the course, during the individual races (the first 3 heats), competitors would run in a longer distance, having to run the runway before attempting the obstacle. However, during the relay races (the last 2 heats), the first competitor from each team would start in the same distance as the previous Team Ninja Warrior seasons.
At Ninja Warrior Poland 2, the Sonic Swing obstacle appeared as the first obstacle in the semi-finals. It eliminated the average number of participants.
At Ninja Warrior Poland 3, the obstacle reappeared as the first obstacle in the semi-finals.
At Ninja Warrior Poland 4, the obstacle appeared first during the Heats.