It can look dumb, but I always had this question as a kid, what physical principles would prevent this?
Everything bends when you move it, usually to such a small degree that you canโt perceive it. Itโs impossible to have a truly โrigidโ material that would be required for the original post because of this. The atoms in a solid object donโt all move simultaneously, otherwise swinging a bat would be causing FTL propagation itself. The movement needs to propagate through the atoms, the more rigid the object the faster this happens, but it is never instantaneous. You can picture the atoms like a lattice of pool balls connected to each other with springs. The more rigid the material, the stiffer the springs, but there will always be at least a little flex, even if you need to zoom in and slow-mo to see it.
