Welcome to the forums! Regarding the MSPhysics extension specifically, no I don’t think you can force a “fake” delay. The simulation runs according to the physics engine rules and the model geometry, etc. You might be able to accomplish the effect you desire in a video editor, by simply inserting a five-second freeze-frame at the appropriate point. If you want the camera to move or other action to occur during the freeze, this approach won’t work.
@Fredo6’s Animator extension can accomplish pauses in action with no problem. However, essentially all motion behavior in Animator must be scripted by hand, as compared to MSPhysics where the motion behavior is essentially all computer-generated.