I'm having trouble finding the reference right now, but if I remember correctly, an experiment similar to yours has actually already been tried. From my faulty

I'm having trouble finding the reference right now, but if I remember correctly, an experiment similar to yours has actually already been tried. From my faulty memory, here's the experimental setup. I hope someone else who reads this can find the exact reference. - There's a huge sphere of a dense metal (something like 20 feet in diameter). - The sphere can be moved closer to or farther away from an incredibly precise accelerometer. - When the sphere is close to the accelerometer, the accelerometer's reading change very slightly due to the gravitational attraction of the massive sphere. (The change in acceleration was just barely detectable given the technology.) - A radioactive isotope has a 50-50 chance of decaying or not in a particular time period. Under the Many Worlds Interpretation, the experimenter is in a superposition of having seen the decay and not. - If the isotope decays, the experimenter pushes the sphere close to the accelerometer. Otherwise the experimenter pushes the sphere away. Now the sphere is in a superposition of affecting the accelerometer and not. - The experimenter reads the accelerometer. The point of the experiment was to see if the accelerometer would detect the deformation in spacetime caused by the superposition of the massive ball in parallel universes. The result of the experiment is that no acceleration was ever detected by other worlds' balls.