Almost at the end of the film, Pvt. Bean (Charlie Sheen) goes to visit Sgt. McKinney (played by his real-life father Martin Sheen). He stops at the reception desk to Psych Admin. The MP manning the post is played by Christopher Judge (Teal'c from Stargate SG-1) who is wearing the name "Estevez" on his uniform. This refers to Martin & Charlie Sheen's real family name: Estevez. Charlie's brother, Ramon Estevez was in the film, playing Cpl. Gessner. As a side note, Emilio Estevez, his other brother, wasn't in the film.