You see Mark learned all the lyrics for the Element Song by Tom Lehrer. Here he is, wearing the shirt, half-heartedly singing the second half of the song (took a while to get the vid started, and he was halfway through the song by then.) The enunciation of the elements is bad, but then look at his posture...
Turn that frown upside down, young man!
|Grumpy time of day.|
|Monkey say, "does this shirt make my head look small?"|
|Gotta wear this to my chemistry class!|