This is a long shot, but can anyone tell me the episode where this happened:

A girl is talking to Will (it's his girlfriend I guess, I'm not actually that clued up on the Fresh Prince), but as she talks, her voice fades away to be replaced by a mumbling sound because Will isn't really listening.

Later on, the roles are reversed, so Will is talking, but his voice fades away because the girl isn't really listening.

If anyone can help me find this scene I'd really appreciate it, so I can show my wife what it's like when she explains things to me!