Visible crew/equipment: When Munro Kelly opens his jeep door on the African runway, a crew-member can be seen reflected in the window. (00:24:25)
Visible crew/equipment: When the first missile is shot at the plane, as the plane rocks, in one shot you can see a tape mark at Dr. Elliot's feet. (00:36:40)
Visible crew/equipment: As the team walks through the ruins, a flock of birds bursts out of a bush. You can see a persons arm shooing them out. (01:19:40)






Answer: Seconds after he drops dead, an ape comes from where he'd been running from and throws a human brain at the living humans. This is Richard's brain, torn from his head. In the context of the film and employing a (fair) bit of suspension of disbelief, he must have had enough brain stem (where reflexes are governed) left to run and scream a bit before dropping dead. In reality, of course, this is an extremely unlikely if not impossible scenario, invented by the screenwriter for the purposes of a gruesome death. Perhaps inspired by stories like Mike the Headless Chicken, an animal which survived for months after having most of its head/brain chopped off.
That wasn't a brain that the gorilla threw; it was the head of one of the two porters with whom Richard remained outside the cave.
Phaneron ★