Why is it when a character in a film has grown large (such as Ant-Man in the Avengers and Civil War), do all their movements appear slowed down, as if they are moving through water?

Question

Why is it when a character in a film has grown large (such as Ant-Man in the Avengers and Civil War), do all their movements appear slowed down, as if they are moving through water?

In: Other

Answer 1

Is mainly for effect but its also because something that grows big has more mass and therefore is harder to move around.