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.
1 y+ N4 w& q5 o) O4 @- q7 `: t! N公仔箱論壇; Q- G0 Y1 Z$ c# I
the possibiolity is endless which will make it impossible to repeat the experiment. |