My understanding is that the equivalence principle only applies to a specific, local region of space time, and this region could be arbitrarily small. Tidal fo

My understanding is that the equivalence principle only applies to a specific, local region of space time, and this region could be arbitrarily small. Tidal forces are only measurable across something with size, by measuring a difference between one point and another. Even if your body is being spaghettified, an arbitrarily small region of your body still can't tell that it's under anything but freefall.