Dave is the 1996 partner of Roger's persona of Dr. Ya Ya as they try to discover the formula for Ecstasy. When Stan and Francine from the present need some Ecstasy from Roger who claimed to have invented it in "The Kidney Stays in the Picture", they bring his 1996 self a copy of the formula that he wrote. Discovering that they need amphetamines, Roger makes Dave throw up drugs he had been ingesting over a four day binge until he finds an amphetamine.

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