You should have known this was coming.
Seeing that it's Father's Day, it's the perfect time to revisit this classic, no-holds-barred father-son relationship. Luke comes home from his studies to find this creepy old guy manhandling his friends, so he takes him to task. Lightsabers and shattered glass ensue until our man in black corners our intrepid hero.
But really, you should know all that. If you don't, you really need to get your geek in shape and get watching.
The Moral: Do what your father says, or he will destroy you.
Now go call your Dad, I'm sure he could use the break after all the chores he's doing today.