103: Like a Rock

Explanation
The original strip was a single panel in which the sitting man (Man 1) tells the standing man (Man 2) to make him a sandwich. Man 2 initially refuses and tells him to make it himself, until Man 1 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, making Man 2's transformation into the Pokémon Sudowoodo the only proper response. The transformation is the most likely reason two panels was used.

The title is a reference to the song of the same name by Bob Seger, often 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.