How does Nikola Tesla walk through lightning in the Prestige?

Answer 1

Tesla constructs a teleportation machine that resembles a Magnifying Transmitter, but the device initially fails to work. But the reality was that the machine creates a duplicate of any item placed in it, which appears some distance away. Remember that it is a fictional machine.

Answer 2

In the movie "The Prestige," Nikola Tesla creates a machine that produces a magnetic field which safely guides him through the electrified water tank, allowing him to walk through the lightning without harm. This is a fictional representation of Tesla's work and abilities.