You are "on your own"? Really? That's the collective wisdom of the experts? Really?
That might explain all those crumpled, busted and wet airframes in the video.
On my reading of the FAR definition and its underlying rationale, and on my understanding of the laws of physics, the answer to my question seems obvious: If you decide to reject and "initate" maximum braking at or before V1, but you detect that you are "achieving" no braking and you exceed V1, you 'unmake' your decision to reject.
Otherwise, the outcome is a certain overrun and another crumpled, busted or wet airframe, is it not?