This is the first appearance of Gunther, who makes an uncredited appearance in the background at Central Perk.
First reference to "Ugly Naked Guy." Chandler points out to the friends that Ugly Naked Guy got a ThighMaster.
This is also the first episode to feature Chandler's way of speaking, ie. Could I *be* more amused.
This is the first episode where clips of the show were put into the opening sequence. It was explained in the DVD commentary that just the fountain scenes made the friends look 'too cool' and clips of the show were added as it helped the audience familiarize themselves with the friends.
The gang is shown watching Three's Company (1976) on TV, specifically a segment featuring only Suzanne Somers as Chrissy Snow. Just moments later, Chandler points out the window and states that Ugly Naked Guy is using a ThighMaster. Suzanne Somers famously starred in all the ThighMaster commercials and infomercials.