Place it at the exact landing moment in the middle of the edit, then follow the aftermath with a metal pipe clang for a second hit, or lead into it with a classic punch sound when the fall starts on screen.
Over dit geluid
This is a 1.7-second effect built around a single heavy slab impact, a dull thud with weight behind it and nothing else layered on top. It feels abrupt and bluntly funny, the kind of sudden stop that turns an ordinary fall or fail into a punchline without needing any words or music to explain it.