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.
( M. X$ N5 v1 P& K4 C公仔箱論壇
; f9 g/ H" m8 D" S+ t6 V2 b1 B6 l' cthe possibiolity is endless which will make it impossible to repeat the experiment. |