Jerry's (Jerry Seinfeld) line, "Stay alive, no matter what occurs, I will find you," is from the film The Last of the Mohicans (1992).
Kramer (Michael Richards) calls Jerry (Jerry Seinfeld) from the intersection of 1st Street and 1st Avenue, which he describes as "The Nexus of the Universe." This realization inspired the opening of the "Nexus Lounge."
Cindy's line to George, about a fellow maid named Coco, telling him "that girl's alright," is a reference to "The Dealership," when Puddy and Jerry discuss Koko, the sign-language-using chimp, and Puddy says, "that chimp's alright."
Kramer (Michael Richards) mentions there is an Original Ray's Pizza shop at the intersection of 1st Street and 1st Avenue. In real life there is a Famous Original Ray's Pizza restaurant visible from the spot where Kramer was standing.
The plot detail of Jerry being hoarse because he was yelling at hecklers was added because Seinfeld was ill during filming.