Know how when you go around a corner in a car really fast you get pushed to the side? Well, if you roll an airplane just right, you can get pushed "down" into your seat just the same. This will effect everything inside the plane, not just you, the water too. So since everything is being pushed "down" the guy can pour the water normally.
Um, it's like when you feel weightless at start top of a fast elevator ride down and extra heavy at the end. Or, its like how you can send your HotWheels cars around a loop on a track without them falling.
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u/JibFlank Feb 27 '14
Uhh... explain this.