Recently I wrote about a cross-over between the "Pearls Before Swine" and "Dennis the Menace" comic strips. Shortly thereafter, I noted a similar meta-take on comics in the "Barney & Clyde" strip.
So I really appreciated the October 29, 2011 sequence in "Barney & Clyde" which references... "Pearls Before Swine" with their character Rat severing as the punchline..
Brilliant. This is what keeps me reading the funnies, folks! (click on the image below to enlarge).