Go, "3.14? Cool, pi!"
And if that didn't work, start in on how Japanese is considered the most difficult writing system in the world because of the three waves of importation of characters from China (some via Korea), resulting in at least three readings of most characters in Japanese, plus throw in a tangent about the rounds of simplifications of characters in China vs those in Japan, and the re-rise of character use in South Korea (and the beginnings of this now in North Korea), and oh, hey, the Korean writing system, hangul, is considered one of the best because of how well it fits the language, and--
Yeah, come the end of that 3.14 minutes, they'd know I was a nerd and be begging me to shut up.
Or I could just quote Lt. Data's "We are more alike than unalike..." drunken speech from "The Naked Now" episode of ST:TNG, and start comparing that ep to TOS's "The Naked Time."