One of the funniest parts of “Syzygy” is a very different chemistry between The X-Files mainstays Mulder and Scully. The planetary alignment is affecting them along with everyone else, and at first this manifests nothing more than a little bit more impatience on Scully’s part, along with Mulder getting a lot more flirtatious than normal with the local detective.
Eventually it gets to the point where Mulder is getting drunk alone in his hotel room while Scully is chain-smoking in hers.
Things eventually get a lot less polite between the two. When an angry Scully complains that Mulder never lets her drive, Mulder answers, “I was just never sure your little feet could reach the pedals.”
The writers apparently used online complaints X-Files fans made about the show to write the barbs Mulder and Scully torture each other with in “Syzygy.” The “your little feet” joke came from one fan’s theory on why Scully never drove, and Gillian Anderson apparently found it particularly hilarious.