so according to relativity, gravity is rly curves in space time. I imagine this in a 2d context, with a 2d world wrapped around a "balloon". Gravity would be like pushing in part of the balloon. If you think about the way this curvature distorts "quantized" space-time, it makes sense that something moving towards a planet would accelerate, and something moving away would slow down. However, this only works for small object vs. large objects. How do two dents in space-time fall into each other? and why would something with no velocity move into a large gravitational source?