If we’re aiming for city‑wide swings, we’d need a yarn that’s as strong as carbon fibre but also compostable. Start with hemp or bamboo threads, add a tiny recyclable hook, and keep the whole system light enough that a single pull won’t turn your street into a rope‑dance floor. Just remember to test the hook on a mock building—no one likes a broken grappling system at the top of the Empire State.

Nice, just remember the roof’s a single‑use scaffold, not a permanent balcony. We’ll need to check load limits, anchor integrity, and the rope’s tensile strength before you decide to leap. Also, city ordinances may require a permit for a public swing—so no surprise arrests while you’re cape‑on‑back. Once that’s sorted, a quick mock‑swing in a wind tunnel should keep you from accidentally turning Midtown into a hammock festival.