Kaikai cover key, moving the body backwards when he habitually played a direct physical, the person has not upright, right-brain pathway in the course of carrying upward into a rigid thing.

• 凯凯摸到钥匙后，挪动身体往后退，当他习惯性地直起了身体时，人还没有挺直，右脑后侧就在向上抬的过程中撞上了一个坚硬的东西。