#789: Showdown

XKCD comic, described below.
Transcript

[[Two cowboys face off silently in the desert, the blazing sun beating down.]] [[They exchange steely glares, hands poised to reach their guns, as a tumbleweed rolls into frame.]] <<TUMBLE>> [[Close-up on the tumbleweed. It draws two guns.]] <<CLICK CLICK>> [[The tumbleweed shoots both cowboys simultaneously, and they fall backwards.]] <<BLAM BLAM>>

The tumbleweed then tried to roll off into the sunset, but due to the Old West's placement north of the subtropical ridge, the prevailing winds were in the wrong direction.

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