Deliberate mistake: While on the sideline during a game, Sayers tells Piccolo that he should ask Dr. Fox to give him something for his hay fever, and Piccolo heads back to the field. The next close up of Sayers is a flipped shot; note the "40" on his jersey. (00:41:55)
Visible crew/equipment: When Piccolo and Sayers see JC pinning the paper with Sunday's lineup, Piccolo begins to walk away. In the closeups facing Sayers, we can see the outline of the strip of tape holding the lavalier mic that's taped to his chest, under his shirt. In the shot facing Piccolo as he walks toward the door, we can see the bulge of the mic transmitter at his back. (00:25:15)
Visible crew/equipment: When Coach joins Piccolo and Sayers in their room, Coach tells them he wants to speak to both of them as it cuts to a medium shot, and the shadow of a boom mic moves around near the top right corner of the screen. (00:38:05)
