My mom used to sing this song (or jingle) about how I looked like a piece of spam, and I put the lyrics to it in the comic. Granted, the song really goes, "It's officially official in an unofficial way. You look like a piece of spam today." It's not "a 'can' of spam." I just did the can because I think the actual meat is pretty gross, but drawing a can for a head on me would be funnier and less gross than the actual meat in the can.
The last panel is just a "the end" card because the original last panel didn't really add anything to the comic, and I didn't want to think of anything else.