Contortionist:

Contortionist Skill (Physical) by Taalismn

Skill in the ability to relax muscles and twist joints beyond normal comfort tolerances. Contortionism teaches many of the same techniques as Escape Artist, but has more of a gymnastics bent to it; skilled contortionists can twist , bend, and squeeze themselves into seemingly agonizing positions without harm. Besides being able to squeeze through narrow openings, a well-practiced contortionist can seemingly compact themselves into small spaces or twist themselves into decidedly painful-looking configurations(like being able to bend one’s legs up behind their back and touch their forehead with their toes).
Base Requirement: Must have a P.P. of 13 or greater.
Base Skill: 30 % + 5% per level of experience. P.P. bonus numbers apply as percentages(so a P.P. 22 bonus of +4 counts as +4%).
A failed roll means the desired position is just too painful to attain or hold for long, and the contortionist snaps back to their regular posture.
Modifiers: +5% if a Meditation or Yoga skill is also taken, and another +5% the person can limber up or relax for 2d4 minutes beforehand.
Bonuses:

+1 to Roll with Punch, Fall, or Impact

+5% to Spelunking

+10% to Escape Artist

+2 to Save Versus Pain, +4 if that pain is caused by dislocation of the limbs or twisting of the body.