Verbindungen

The final scene of Walt laughing in the space references the ending of Treasure of the Sierra Madre where the sheer absurdity of the consequences of the main characters' greed causes them to burst into uncontrollable laughter

mentioned in dialogue

The presence of oranges indicates death or injury

Hank says to Walt, "You lose your hair, you go on a couple of stake outs, and all of a sudden you're Kojak?"

Hank says to Walt, "Shit, it's starting to feel like Three Days of the Condor, you know?"