You do just sit there. In the GR-realism view, the only thing particles _ever_ do is self-propagate forwards in time. The problem is, this means the particle’s

You do just sit there. In the GR-realism view, the only thing particles _ever_ do is self-propagate forwards in time. The problem is, this means the particle’s definition of “time”. Spacetime is 4D, and this can be any timelike direction. That’s what causes it to appear to move, from the perspective of someone whose time vector is pointed differently. Then time can be curved, which reorients said vector as the particle propagates through it. That’s gravity.