Mri shows medium size cyst at s2 (racepinephrine). electric shock feeling at r hip joint when i turn my body to r or turn hip to l. are both related? any test to prove

No: S2 (racepinephrine) sacral or talovs cysts are actually fairly common. Once in a while they can be symptomatic but your right hip is innervated by l1-l2 and L3 nerves. So they are unrelated. S2 (racepinephrine) cysts would cause buttock pain.

Talk to your doctor: The "cyst" is most likely what we call a "tarlov" or "perineural" cyst, and represents a dilatation of a nerve sleeve without consequence. Your pain is likely related to a compression of a branch of the sciatic nerve, or possibly to right hip arthritis. You should be examined by your doctor.