Visible crew/equipment: Just after Tarzan goes under the stone door, he finds the torches dropped by the bad guys. The flame from one of the torches is reflected in the camera lens, and was caught on tape. It looks like a single, unattached flame is hovering on the stone wall nearby. This is made even better when Tarzan picks up the torch and then drops it, the reflection follows his movements precisely.
Visible crew/equipment: After Ravens has knocked Tarzan out against the stone wall and he staggers to his feet, over his shoulder you can see the shadow of a crew member moving to the left of the screen.