After Eugene upsets Mikal, the boys start driving off on their own again. The boys begin to discuss Eugene's behavior towards Mikal. Eugene says "What do you care? We're looking for Irene, right?" Zia says "Yeah, we're looking for Irene." Eugene says "Well, then, let's look for Irene."
Who is Irene? They are looking for girlfriend named Desiree.
Note: Not a slip-up. An intentional joke. Eugene can't remember the Desiree throughout the whole search. He calls her several different names, then, Mikal, in a sarcastic tone, says "Yeah, Eugene !. Let's go look for "Irene"!