Other mistake: Sandman AKA Flint Marko is the first of the villains to be changed back at the Statue of Liberty fight, and he is told by Peter to stay inside the head to be safe. Seconds later Electro discharges a massive electric surge onto the statue head, which is made of bronze, which is a good electric conductor. Marko should not have survived that. (01:47:40 - 01:48:10)
Suggested correction: It's made of a good conductor that would protect him like a faraday cage if anything. (Almost) all the energy would go through the metal, not the less conductive person.
A faraday cage is very sophisticated, calculated, engineering to block electromagnetic fields. You can't accidentally have a faraday cage.
Other mistake: Doc Ock's weakness in Spider-Man 2 was electricity, which knocked him out. Yet Electro doesn't bother him as he's shooting off jolts prior to Ock curing him.