What is that movie called when this girl ties her foot on the boat with a rope then she falls and loses necklace grandma gets in heart attack?

That sounds like the movie "The Sisterhood of the Traveling Pants" (2005).

Here's why:

* The Girl: Lena, one of the main characters, is on a trip to Greece with her family.

* The Rope: She ties her foot to the boat with a rope to prevent herself from falling overboard.

* The Necklace: Lena's grandmother gives her a special necklace before she leaves.

* The Heart Attack: Lena's grandmother has a heart attack after witnessing Lena fall overboard and lose the necklace.

Let me know if this sounds right!