Unique in that Buster Keaton, renowned as "The Great Stone Face", plays a highly emotional character (a child) who frequently cries and laughs.
A lot of the abuse "child" Buster receives from "father" Fatty seems to be lifted from Keaton's vaudeville act where his actual father Joe Keaton would throw child Buster all over the stage in a comic portrayal of a dysfunctional family.
Included in "Buster Keaton: The Shorts Collection" blu-ray set, released by Kino.