I was reading "The Physics of Superheroes" by James Kakalios and I came across the following paragraph:
In one scene during their climatic battle, Spider-Man manages to deflect an electrical bolt that Electro has hurled at him by tossing a metal chair over Electro’s head. “Anyone with any knowledge of science knows that anything metal can act like a lightning rod,” Spider-Man says, lecturing Electro, “as this steel chair is doing!” Actually, Spider-Man’s mistaken understanding of how lightning rods function suggests that his allegedly advanced knowledge of science isn’t all it’s cracked up to be. The electrical bolt is shown arcing away from Spider-Man and chasing after the soaring chair—even though the chair is not electrically connected to anything! Why would Electro’s lightning bolt be pulled toward the chair, metal or not, if once it reaches the chair there is nowhere for the electrical current to go?
I'm not sure about this. The chair doesn't need to be at Earth's potential to be hit by Electro's bolt. It only has to be at a lower potential than Electro. It doesn't matter that the current cannot exit the chair: some charge will flow from Electro to the chair, enough to bring the chair and Electro at the same potential, after which (I guess a microsecond or so) the current will stop. After all, airplanes are big flying metal objects,but they can be struck by lightning. So why shouldn't it be the same for the chair?