Visible crew/equipment: Special effect projectors and strobe lights can be seen in a reflection on Max as the ship is descending towards the bay - moments before blasting into hyperspace to return David to his home in 1978. (01:22:15)
Visible crew/equipment: When David starts to navigate the ship, watch the metal wall behind him, and you will be able to see the camera crew and realize that the spaceship is a prop by seeing a black wall behind the camera.
Visible crew/equipment: Camera lights in the dark woods are reflected in Jeff's glasses after he jumps down from a tree and frightens David. (00:09:50)
Visible crew/equipment: At NASA when David makes the call to his family at home, boom mics are reflected on the phone Bill uses. (00:33:45)
Visible crew/equipment: After David agrees to be taken to NASA headquarters for a 48 hour observance, Dr. Faraday winks at him, and in the left lens of his glasses (from the viewer's perspective) we can see the camera operator at work. (00:28:35)
Answer: I can't directly answer this, but I was watching this movie just now, and didn't take in the girl at the beginning's (Jennifer's) name, so when Sarah Jessica Parker, Carolyn, appeared I then spent the rest of the movie assuming that she was going to turn out to be the girl he was crushing on in 1978, especially when Carolyn even told him he was cute (which is kind of a weird thing for a 20-year old to say to a 12-year-old if there isn't a plot reason for it). I do wonder if that was in fact the originally intended idea that was changed for whatever reason before the movie was completed, and if perhaps he was meant to go back to 1978 with the knowledge that she found him cute and therefore a new-found confidence to ask 12 year-old her out.
MrDannyDetail