1 {scene: Head Death's desk on the Infinite Featureless Plane of Death}
1 SFX: Riiing!
2 Head Death: Hello?
3 Phone: Ribbit.
4 Head Death: Paradox...

After the Head Paradox's last appearance, several people wrote to point out that he was probably one of these.

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Gunnar Kvifte, an M.Sc. student in biology at the Natural History collections, Bergen Museum, Norway, writes:

you suggest that the character Head Paradox is a paradox frog Pseudis paradoxa. This is, however, very unlikely as his only line is "ribbit". The call of the paradox frog is different; according to AmphibiaWeb it consists of "a sequence of 8-11 pulse groups".

A more probable species identification, based on the "ribbit" call, is Pseudacris regilla. This is a common frog in California, and has been extensively used as a sound effect in Hollywood movies.

Head Paradox, who is a paradox and a frog, is thus not a paradox frog. While not strictly a paradox, it is paradoxical enough to be appropriate.

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2025-03-10 Rerun commentary: A dirty little secret: The Infinite Featureless Plane of Death is not actually an infinite two-dimensional sheet of Lego baseplate.

Sometimes you can see the edges of the square baseplate in the photos, and I've attempted to cover them up by clone-brushing part of the baseplate into the empty areas. You can see this in the upper right corner of the first panel, there's a diagonal line across the corner where the pattern doesn't quite match up properly.