Skateboarding does not affect gravity gravity affects skateboarding. Many defying gravity move is just a trick earn from hard practice.
The plural of defy is defies. As in "this defies the laws of gravity".
Hovercraft - they defy gravity.
Skateboarders do not defy gravity. They use typically an ollie to do aerial tricks. An ollie is a move in which the skateboarder "pops" the tail (to push the board in the air) and slides their front foot forward (to balance the board). This is probably the most useful trick in skateboarding. From an ollie you can grind or grab or flick the board.
No, vampires cannot defy gravity. They are not able to manipulate physical properties such as gravity. They are bound by the laws of physics just like any other creature.
No
Magnets do not defy gravity, but they can create forces that appear to defy gravity. When a magnet is placed near an object, it can create a magnetic force that opposes the force of gravity acting on the object. This can make the object appear to levitate or hover.
The chemical that is called defying gravity.
They cannot.
Ultimately, no.
The water seemed to defy gravity.
No.
nothing