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. : _* f) u# R; i8 L5 V
# }, `3 B8 I2 j2 @7 A! d公仔箱論壇the possibiolity is endless which will make it impossible to repeat the experiment. |