SWOTL = Secret Weapons of the luftwaffe.
SWOTL is a game of LucasArts. For more info click here ;):
http://www.mixnmojo.com/php/site/gamedb.php?gameid=48)
In the final credits of Grim Fandango there are a few names of themes of the game (Compaсeros, etc) and a theme is:
"Secret Weapons of the Luftwaffe Theme by Michael Land".
Michael Land is a compositor of music of LucasArts (he worked on Monkey Island series). So the SWOTL theme is in anywhere of Grim Fandango (possibly a reference). I'm trying find the theme in the game, but I don't know how the theme is :(