In Belleville, the S.W.A.T. and the army will say ridiculous insults, such as "I fart in your general direction!" and "I wave my private parts at you, you son of a silly person!" These are insults from the movie Monty Python And The Holy Grail, in which the protagonists are taunted by French guards with these exact quotes and many others.
When you do the first story mission in Belleville, Pox will talk about video game ideas. Crypto will say "You're a plumber, but you don't use plumbing stuff to kill your enemies, you just jump on them", "You're a really fast hedgehog", and "You're a space marine on a planet with a ring around it". Pox will say that all of the ideas are crappy and then makes up his own idea.