Watch the part where Indiana is in the temple containing the cup. Pay close attention to the part were he is about to walk across the canyon where it looks like there is no bridge or footing to get across. Look at his feet when he is walking over the path of rock. Hes hovering, it doesnt even look like his feet are touching anything solid, even though it sounds like he is walking on stone. They could have done a better job with the sound editing.