Who's Gary? (Possible SPOILERS)

Now, I might just be uninformed because it's only 46 minutes into the movie my first time watching it. At the moment Eddie/Reynolds is at the house in Missouri hold up in the bathroom and Anton with the other dude is on the outside. At which point, Anton says "Gary?" Maybe... Anton is talking to the guy holding the SPOILER - shotgun - or is a goof type thing?