There isn't a specific scene in Toy Story 2 that explicitly explains a law of gravity. However, the movie does demonstrate the concept of gravity in several ways, particularly in the scene where Woody falls out of the window.

Here's how it works:

* Woody is initially standing on the window ledge, defying gravity. He's able to stay there because he's being held in place by his rope, which is tied to a hook on the wall.

* When the rope breaks, Woody is no longer supported. Gravity takes over, pulling him downwards.

* He accelerates towards the ground. This is because the force of gravity is constantly acting on him, increasing his speed as he falls.

* The scene emphasizes the downward direction of gravity. Woody's body falls straight down, illustrating the direction of the gravitational force.

This scene, although not explicitly explaining the laws of gravity, visually represents the force of gravity and its effects on objects, including acceleration and direction.