If reality is so loosely weaved, leave your house by the second floor window because you strongly believe you will be able to leave the house that way and then see if your assumption holds up.
From your perspective, I might be dead. From my perspective, though, the universe itself would have ceased to exist along with me. That's exactly what I mean. Does reality exist for me separately from my perception of it? Rather, it seems like it's constructed by my perception of it.
But you do admit that you will fall? Therefore there is an objective reality to that outcome?