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There's a joke here, somewhere, but the joke dissipates abruptly and the punchline, lost, disperses the energy of its expectation to an audience as nervous flatness. This type of joke flips the roles, the performer now audience to reaction, making the best of such jokes just complex enough to contain within the possibility of real punchline hidden and produce doubt, a heightened consciousness of where exactly this all lay, the blankness of its meaning a projectable void that you can stand on many sides of.
See too: William Pope.L at Catherine Bastide