103: Like a Rock

Explanation
The original strip was a single panel in which one stick figure tells the other to make him a sandwich. The recipient initially refuses and tells the other figure to make it himself, until the latter reiterates his command, prefaced by the Unix-like program "sudo".

Here, the comic is made into two panels. In the first panel, Man 1 says "Woodo". Man 2, not understanding what that would mean, says, "What?" In the second panel, Man 1 again adds "sudo" to the beginning of his previous dialogue, and Man 2 is transformed into Sudowoodo, a species of Pokémon.

The title is a reference to the song of the same name by Bob Seger, formerly used in commercials for Chevrolet trucks. It was used as the title for this strip because Sudowoodo is a Rock-type.

The author writes:
Original xkcd strip: #149.

Transcript
Man 1: Woodo. Man 2: What? Man 1: Sudo woodo. {Man 2 is now a Sudowoodo.} Sudowoodo: Okay.