In the movie when they finally get the boat unstuck, it cuts to a shot showing the boat going backwards... and if you look close enough, you'll also notice the waterfall is going upwards
This is because when they were filming, they figured that it would be cheaper to just reverse the scene instead of filming a new one. They just forgot to make the waterfall run down again.
This was also in a Paula Abdule video. I heard somewhere that it's the camera that makes the waterfall appear to run upwards. Also, my aunt went to Niagara Falls and recorded it, and when she played it at home it looked like it was running upwards. So I think that may have something to do with that.
Some cameras work like that. If you notice in some movies when they show ambulances and police cars it spells the word backwards. Also in other movies it shows car tires running backwards. It might just depend on the type of camera or lens that was used.
Let's try this, next time you are driving down the highway, look at a car's tires with custom rims. You will notice that the rim "appears" to turn the opposite direction that the car is traveling. It's an optical illusion. You can even buy a white fan and paint one of the blades black.
I've never seen a movie of a waterfall that looked as if it were flowing upwards, other than in this obviously reverse transfer, especially considering the fact that when you reverse the sequence on your DVD player, the entire scene looks perfect and natural, even the movement of the boat.
The waterfall is running up, the boat is going backwards and the people are facing the same direction as when they came in. Also the small waves generated by the falls are moving towards the falls instead of away from them.
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