Walking down a corridor is a song sung by Homer in the episode Bart's New Friend. Homer sings it while walking down a corridor while at work at the Springfield Nuclear Power Plant. He stops when he sees a retirement party in the break room for another safety inspector, Don Bookner.
The lyrics are:
Walking down a corridor using both my feet. Wish I was in Florridor . Now I will repeat. Ohhhh, I'm walking down a corridor using both my feet.