There is a stark difference in a nudge like a small one (machine doesnt move) or big one (machine is in a new position), slap, or death save. I (guilty nudger, and slapper when stuck, but i do not bang machines around on machines that in private collections. I nudge a little harder on machines in wild with loose tilt mechs.
Owner plays into it
on DougP's machines I nudge gently, and ditto on future father inlaws machines also.