>>12144125gravity is just the interaction of matter along a 4th plane that cannot be visually quantified, because our senses rely on 3d particles.
on that same line of thought, "virtual particles" are just the 3d particles in the 3d slices surrounding us in the 4d plane, pressing against our 3d slice of the 4d plane. think of it like a stack of paper, each stack is a strictly defined 2d plane, but they are touching each other on a 3d axis, and any 3d bends or depressions in those 2d pieces of paper, directly influence the 3d curvature of the surrounding 2d pieces of paper.