I'm wondering if any set of hypothetical conditions could result in us gravitating in a different direction. Specifically a reversal of gravity on the surface of Earth (or at least part of it), so that for people there, the ground would be above their heads, and everything unattached to it would fall into the sky.
At first I thought along the lines of a black hole passing by our solar system, but realized that could probably not suck things off the Earth's surface. Could anything other than a biblical rapture do this without breaking obvious physical laws? I know it's far fetched but thought I'd try anyway.