The Moral of the Story...

One day at the end of class little Billy's teacher has the class go home and think of a story and then conclude the moral of that story.
The next day Billy tells his story....
"My dad fought in the Vietnam war, his plane was shot down over enemy territory. He jumped out before it crashed with only a case of beer, a machine gun and a machete. On the way down he drank the case of beer. Unfortunately he landed right in the middle of 100 Vietnamese soldiers. He shot 70 with his machine gun, but ran out of bullets, so he pulled out his machete and killed 20 more, but the blade on his machete broke, so he killed the last ten with his bare hands"
Teacher looks in shock at Billy and asks if there is possibly any moral to his story....
Billy replies, "Yeah... don't mess with my dad when he's been drinking.