A slip or stumble can result in strong sudden
shear forces across a joint, or sudden twisting which pulls directly on the ligaments - one interesting fact is that ligaments are NOT designed to be
used at all!
When
using a lug wrench - very good quality and an extension bar, apply the
force by pulling up on the bar and
use your leg muscles to provide the
force - I have
sheared big wheel studs as per Landrover like this but I'm 18 stone and 6» 3»..