#论文导读 快报—— 佐治亚理工的Saad Bhamla组用高速相机研究了一下打响指,发现是中指和拇指之间储存的摩擦力势能被迅速释放,中指打到掌根发出的声音。皮肤表面太光滑(刚涂了护手霜)不行,摩擦力太大(橡胶手套)也不行。结论是灭霸戴那个手套八成打不出响指 @mature Acharya, Raghav, et al. "The ultrafast snap of a finger is mediated by skin friction." Journal of the Royal Society Interface 18.184 (2021): 20210672.