New Directions performs Bust A Move by Young MC (Marvin Young). The first line in the second verse of the song says "Your best friend Harry". Mr. Schuester (Matthew Morrison) points to Mike Chang when he says it. Mike Chang is played by Harry Shum Jr.
Although the character Matt is believed to not have any lines until much later in the season, his first time speaking in the series is actually in this episode. While between Finn Azimio on the football field, Finn pushes Azimio and Matt can be faintly heard yelling "Hey!" At Finn while trying to get him to calm down.
At 10:28, as Will and Emma lie on the floor laughing after they trip, a definite fart sound can be heard.
Max Adler's first episode