Beginning with an imagined encounter between Buster Keaton and HenriBergson, this essay offers a fundamental re-reading of Bergson's Laughter and its theoretical, historical and formal links to slapstick cinema. It focuses on neglected references by Bergson, Gilles Deleuze and James Agee to a sympathetic, schizophrenic and "boffo" laughter virtually yet viscerally connecting audiences to slapstick's acrobatic automatons and vitalized machines. It argues for a more dialectical relationship between terms often thought opposed in Laughter and with it, both New Bergsonian theories of film and slapstick: vitality and mechanism, laughing and comic bodies, pragmatism and sympathy.Who Loves that Buster? In his Billy Wilder, wie haben Sie's gemacht? (Billy, How Did You Do It?, 1992), Volker Schlöndorff elicits a revealing explanation of how Buster Keaton came to be cast in Wilder's Sunset Boulevard (1949). Keaton plays himself as a member of the "waxworks," a group of aged silent film icons invited by Norma Desmond for bridge. In a brief slapstick bit, Keaton darts his deadpan gaze around the table before croaking, "Pass," an admission of defeat in the face of a bad hand, but also, the film suggests, in confrontation with synchronized sound (see Figure 1). In conversation with Schlöndorff, Wilder laughingly 2 admits to reducing Keaton's tragic career arc into failure at bridge, explaining that it was not Keaton's status as a formerly "great comedian" that prompted his casting, but his reputation as "a very good bridge player." Despite the brevity of Keaton's cameo and Wilder's explanation thereof, both reveal intertwined theories of film comedy and film history, what James Agee and Manny Farber described in their reviews of Sunset Boulevard as a "coldness," a "dispassionate" distance in which "tragedy…is largely muffed" by "a mean director with telescopic eyes." 1 Here, tragedy mechanically repeats as farce while laughter depends on a cold, distant and mocking gaze. This gaze underlies Wilder's casting a "very good bridge player" and former silent star only to hear him "pass," an ironic outcome seemingly fated by not only Keaton's then moribund career, but his earlier slapstick, with Buster's melancholic deadpan a necessary point of contrast with the lively laughter of his audience. Just as Keaton had prefaced his resigned "Pass" with a flash of slapstick so does Wilder, in setting up his punchline, hint at this status of "great comedian." He does so by bursting into song, reciting: "Meine Schwester liebt den Buster, / Liebt den Keaton, / und sie zieht'n / Dem Chaplin vor!" ["My sister loves that Buster, / loves that Keaton, / and she'll take him / over Chaplin!"].What song is Wilder singing and how does its recitation confirm or contradict the theories of film comedy and film history suggested by Keaton's cameo in Sunset Boulevard?Written by Friedrich Hollander in 1930 and inspired by Keaton's visit to Berlin, "Meine Schwester liebt den Buster" was sung in cabarets in the early nineteen-thirties, its composer one of th...