The walrus was Paul

The latest installment of the TMBG podcast (episode 5A) has a neat little thread with a "meta" theme. Starting at time index 3:09:

• Savoy Truffle. TMBG covering a Beatles song that refers to another Beatles song, "Ob-La-Di, Ob-La-Da".
• (She Was A) Hotel Detective In The Future. TMBG playing a new song that refers to an old TMBG song, "(She Was A) Hotel Detective"
• Commentary track for (She Was A) Hotel Detective In The Future. TMBG, pretending to be other people, commenting on a song which refers to another TMBG song.

If you don't overdose from the massive shot of meta, you'll get a kick out of it.