Roy Till says that even though Guillermo is a player in a Mexican cartel, he is in fact Puerto Rican and wonders how he may have gotten that job. This is an inside-joke by the writers; the actor playing García Gómez, Guillermo Diaz, is from Puerto Rico.
The song during the end credits is Thank You for Making Me Feel Better by Linus of Hollywood.
At 20 minutes Andy and Len sit in the beach drinking beers. BUT it is quite obvious that they are not drinking. They put the cans to their lips, tilt their heads back and pretend to drink but their Adam's apples never move so they are not really swallowing.