Deadpan vaudeville days, Buster Keaton developed his deadpan expression. Keaton realized that audiences responded better to his stony expression than when he smiled, and he carried this style into his silent film career. The 1980 film "Airplane!" was performed almost entirely in deadpan. Many popular American sitcoms use deadpan expressions to deliver dry humor, including "Curb Your Enthusiasm", "Arrested Development", and "My Name Is Earl". More recent examples are Andre Braugher as Captain Raymond Holt from the TV show "Brooklyn Nine-Nine", Jennette McCurdy as Sam Puckett in "iCarly", and Louis C.K. in "Louie". Another example is the comedy of Steven Wright.
Pork pie hat to obtain Hackman's hat elsewhere. At about the same time, Robert De Niro wore a pork pie hat in the 1973 film "Mean Streets" (the same hat he wore when he auditioned for the film). Today the wearing of a pork pie hat retains some of its 1930s and 40s associations. Fashion writer Glenn O'Brien says, "the porkpie hat is the mark of the determined hipster, the kind of cat you might see hanging around a jazz club or a pool hall, maybe wearing a button-front leather jacket and pointy shoes. It's a Tom Waits, Johnny Thunders kind of hat.