Frasier Season 9 Episode 19

Frasier and Niles break into their childhood home to retrieve the time capsule they left underneath the floor. They break in by coming in through a window, which was the same way they used to go out after curfew when they were young. Upon breaking in, Niles congratulates Frasier and tells him, "You've still got it." Frasier replies that it is "just like riding a bicycle."

That is an odd thing for Frasier to say because we learned in the next season's episode 'Fraternal Schwinns' that Niles and Frasier never learned how to ride bicycles when they were young. In that episode, Frasier even remarks to Daphne that people are always saying "it's just like riding a bike" in conversation, "but I only understand it in theory."