Step across the edge... and feel nothing
In general relativity, the event horizon is a boundary of no return. Crossing it produces no locally detectable change—yet your fate is sealed.Black Holes: Event Horizon—The One-Way Door You Can’t Feel
A perfect one-way membrane
Physicist David Finkelstein called the horizon “a perfect unidirectional membrane”: signals can go in, never out. Inside, spacetime funnels everything inward.Black Holes: Event Horizon—The One-Way Door You Can’t Feel
