The riff: Inserted as dialog by Tom after a scientist mixing chemicals says “Now, if I can just get this formula properly recorded…”
The explanation: David Geffen is a well-known American businessman and philanthropist who is noted for his contributions to medical research in particular. He owned several record labels before also being one of the three founders of film studio Dreamworks in 1994. Tom is clearly referring to the guy in the film hoping to get a medical research grant or something of the like from Geffen.
Novelty factor: I’d actually never heard the name before, although I knew the two other founders of Dreamworks, Steven Spielberg and Jeffrey Katzenberg.