Several mushroom clouds can be seen in the skybox for the level, this may be a reference to a similar event in Call of Duty: Modern Warfare, where a nuclear weapon is detonated in a middle eastern town.
Some of the walls in the level have "Prestige is a lie!" written on them, this being a reference to the famous graffiti in Portal stating "The cake is a lie!".
There are posters advertising a drink called Sunny Dukelite: Figjuice from concentrate, being a reference to the popular kids drink, Sunny D.
The popular graffiti face known as "Kilroy was here!" can be seen on some of the walls of the level.
There are two parts of the level where you can hear a large melee fight taking place nearby, one is near a battering ram behind a fence with a Pig Cops head, the other is near the giant tepee behind some concrete blocks.
There are several signs stating the street is not to be used as a bathroom, usually with large piles of excrement nearby.