Guess the Trope

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Across
  1. 1. Marty McFly approves of this trope
  2. 5. How did it end?
  3. 7. Common practice to find peace between kingdoms
  4. 8. Gossip travels faster than usual
Down
  1. 2. imgonnagetyouback
  2. 3. The city of Troy was victim to it
  3. 4. They need to put more couches on bedrooms
  4. 6. What's my age again?