Significance of The scattering of Alice's ashes

The scattering of Alice's ashes by Waldo and Shenkman symbolizes Waldo's emotional intelligence, especially as it compares to Shenkman. He takes the reins when Shenkman does not seem to know what to do and tells Shenkman that the spirit of her mother will come back in ways they do not expect, likening her to stardust that creates new stars and planets. The event also makes a point of how people are connected through time in ways they do not necessarily know or expect.