But... if every joint in the body could twist at will, even the cervical spine capable of 140 degrees of motion in all directions, in this world where a normal person would surely be dizzy, let alone retaliate, a land-sick patient would be like returning to the sea, able to easily stand firm and counterattack.
Iron fists capable of crushing black diamonds;
Joints with an extraordinary range of motion;
A sense of balance that could counterattack on a single toe even in extreme situations;
The three extraordinary characteristics turned the elderly man into an octopus with fists covering its body.
With both power and surprise on his side, even if one knew the relevant information, one would still be hard-pressed to guard against it during combat. Moreover, the abnormal range of motion in the joints made it impossible for the opponent to execute joint locks or grappling techniques, and one could easily be strangled by that super flexible body.
(He's a deep and unseen old fox.)