A soldier who training to use grenade.His ladder says:''When you open your grenade plug ,
you try to count 5 second like this ( 1,2,3,4,5 and throw it)''.
So this soldier had an good results in training.After a year, war is beginning.This is his first
time in war. So In battle war, he just put out a grenade plug and count 5 seconds, but WHY
HE WERE FAILED AND EXPLODE HIMSELF ??? Try to guess it !!! My answer is very fun.