Visible crew/equipment: When Rasczak tells everybody to fall back into the compound and "hold what they've got", there is a shot of one of the bugs being killed and landing on some silver containers, knocking them over. The wires used to pull the containers over are visible. (01:32:35)
Visible crew/equipment: When they capture the brain bug, just before Carl says "It was a man called Zim [who captured the bug]", you can see a microphone antenna shadow is visible on his back. The shadow of the camera on his shoulder can also be seen in the fullscreen DVD edition. (01:57:35)
Visible crew/equipment: In the scene towards the end, in the cavern containing the brain bug, there's a pyrotechnic set-piece of a massive quantity of ammo being used up. This was filmed from a number of angles, and in one shot, looking down across the cavern there is a camera man and an assistant visible in the mouth of one of the tunnels leading in. I don't know if this is corrected in the DVD release, but it was certainly there in the UK theatrical version.
Visible crew/equipment: When Rico gets thrown from the tanker bug and lands on his back on the ground, a piece of the flap covering the mattress pops up.
Answer: The card face up is the one he's trying to guess. The card that flips over is his guess (you can see him hit a pad when he says "ace of spades".) So he is trying to use mental powers to guess the card that is face up (which he can't see as he has his back to it), and (presumably so the computer can track his results better) he makes his choice on a keypad, which then turns over the card on the screen (which is why the card is what he said, yet still wrong).
Gary O'Reilly