The poster in Murray's office reads "New Zealand - better than Old Zealand".
Bret and Dave confuse a bunch of rappers including Mos Def, Ice Cube, Method Man and Snoop Dogg for appearing on Law and Order: Special Victims Unit. The actual actor they are thinking of is Tracy Marrow (known as Ice-T in the music world).
Bret: Johnny Boy, thanks for applying to be in my gang. Do you have any gang experience?
Johnny Boy: Do I have gang experience? I was in the Snake Eyes, the Duckies, the Cuckoos, the Vampires, the Ballroom Dancers, the Hobo Lords, the Little Enchanters...
Johnny Boy: (cont.)...and in '54 I joined the Monkey Lords. After that the Rockers, the Gentlemen Jims, the Tsars, the Stars, the Mighty Midgets from Queens.
Bret: So you've had a lot of gang experience, basically?
Johnny Boy: They're all gangs, Big Daddy!
Dave: Here in the United States rivalries between rappers usually result in death, or worse.
Dave: Yeah, or worse. Isn't it the same way with rappers back in Newfoundland?
The "Tough Brets" dance sequence with the snapping is reminiscent of several numbers in the musical West Side Story.