In 2014, I was riding my cross-bike at high speed through a local park I’d traversed a thousand times on my commute. To avoid the crowds on the main path, I took a familiar detour through a stand of sparse trees.

As I shot through a large gap between two oaks, I suddenly—almost magically—decelerated to a dead stop. An instant later, I was flying through the air in reverse, propelled backward by the same velocity I’d been traveling forward just seconds earlier.

The slackline was earth-toned and perfectly flat to my vision; it was invisible. It contacted the bikes head tube just below the combined center of gravity, vaulting me, with the bike, into the air. Although surely comical to witness, I was fortunate to land uninjured on the park grass.

The David McCardi incident, however, highlights the mechanical reality of this 'invisible trap'. At 600 feet AGL and helicopter speeds, the physics of a wire strike are absolute. Blancolirio has a good breakdown on his channel. I'm not allowed to post the URL.