Thane Tobias's Testicular Torque

force one creature within 30 FT. of you to make an Athletics (STR) saving throw.
on a failed save the creature is forcefully spun by their testicles clockwise relative to north and takes 1d8 non-magic Bludgeoning damage, knocking them prone for 2 rounds. the creature is unaffected on a successful save.

creatures that lack any testicles or other male genitalia automatically succeed the saving throw.