When Jim (Bill Maher) walks into the Piranha Women's Temple he's wearing a huge backpack, but when he comes out it's gone. This may be intentional since Bunny's (Karen M. Waldron) outfit changes frequently from scene to scene.
(at around 81 mins) In the scene at Malibu Estates, two hands are visible holding the "Cultural Assimilation: Piranha Women" sign in one of the shots. In another shot seconds later, the person holding the sign is gone.
At the initial, top-secret, "national security" briefing, supposedly just for Dr. Hunt, they proceed with ditzy coed Bunny' in on the discussion.
When Jim "turns off" the harmonica playing, he's actually adjusting the graphic equalizer on the boom box.