for the glass fragment to strike her, the glass has to be smash at a precise speed and precise angle with a precise orientation, and possibly if the glass has any pre-existing defect. 公仔箱論壇7 Z% i& ]( T$ c, p1 y) R
4 t8 o0 S% v P$ Othe possibiolity is endless which will make it impossible to repeat the experiment. |