Since the Spring Festival Gala, I've been tossing and turning, sleepless. While others were playing "Fight the Landlord" needing one more player, I quietly dug out my three-year-old physics textbook from high school and studied hard for a few days. Though not as proficient as a teacher, I'll attempt to solve it:
Because human skin is not in a vacuum and has mass, movement generates acceleration. Its F = uN,
where N is the pressure, on horizontal skin N = mg, u is the sliding friction coefficient, which is related to Charlene Choi's skin.