The initials of Captain Hero's fraternity are the Greek letters phi and alpha followed by the Hebrew letter gimmel, making the frat's name essentially "F.A.G."
During a scene when the guys raid the immigrants' house at night, Hero, Xandir, and Wooldoor are all barefoot. This is the only time Wooldoor is depicted without socks; his feet are revealed to be sock-shaped (although he seems to have two toes on each foot). In previous scenes, he had always worn socks, even at odd moments (such as in the hot tub or in the pool).