Here is a short account of Steve Trotter's pendulum stunt at the Skyway bridge in Tampa, FL.
https://youtu.be/G-y4CqHpAL4It's interesting to consider what the tension in the rope may have been when it failed. It's not a drop load as alleged in the video, but rather the centrifugal force that gradually adds to their weight and maxes out at the bottom of the swing, when their speed is highest - and that's where the rope/knot failed. A simple calculation can show that this maximum rope tension should be a little less (due to air drag) than 3 times their combined weight at rest (i.e. probably shy of around 12 kN).
N.B. If they dropped straight down instead of swinging, the tension in a dynamic rope arresting them (assuming some 40% stretch at break) could peak at nearly 40 kN (if the rope doesn't break earlier).
