I remember reading a thought experiment awhile back (it was in the context of a discussion on Multiverse theory) about what it would look like for beings in a two dimensional universe when a three dimensional sphere intersected their two dimensional reality (essentially nothing, followed by a point, followed by a circle that first expands then contracts, then a point, then nothing). I couldn't help but wonder if this same sort of construct could explain what's happening in both quantum mechanics - particles popping into and out of existence are in reality just moving along an extra dimension that is not accessible to us (our entire reality is a single point on that dimension), and general relativity - spacetime is warping "into" that other dimension (think about the analogy of gravity where a bowling ball distorts the surface of a trampoline, there has to be one additional dimension beyond the trampoline surface for it to warp into). Of course, I'm probably way off base and just thinking nonsense.