Little kids turn to speak about what he learned from a relative's experience?

The little kid says, "My grandfather was flying over enemy territory during WW2 when he was hit and he had to eject from the plane. On the way down he pounds a 1/5 of whiskey. Once he landed he killed the first 20 guys he saw with his rifle. He proceeded to kill another 12 with his pistol, 5 more of the enemy died from grandad stabbing them with his knife and after it broke he killed another 3 with his bare hands."
The teacher asks in a shocked voice, "What did you learn from that?"
The little kid replies, "Don't fuck with grandpa when he's been drinking."