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.
3 w) Q* F' n7 S: v# i' u: O公仔箱論壇1 x l ^. P/ P/ e0 f
the possibiolity is endless which will make it impossible to repeat the experiment. |