I like the theory that he's speaking Gallifreyan, and delivering some really super-advanced stuff, but when the TARDIS translates it into English there aren't any equivalent words and it just comes out "physics, physics, physics.
Kaylee: "Wash, tell me I'm pretty." Wash: "Were I unwed, I would take you in a manly fashion." Kaylee: "'Cause I'm pretty?" Wash: "'Cause you're pretty." (Firefly) Jewel Staite as Kaylee Frye, Alan Tudyk as Hoban 'Wash' Washburne