Factual error: Considering the brightness of the fusion process, Dr. Octavius has to wear special goggles to be able to see it. Yet no one else in the room is wearing such goggles or seem hurt by watching the whole process, just as at the end of the movie. When welding something, no one can look at the arc that's created, as it would hurt his eyes and burn his retina; presumably, the fusion process would be brighter and more powerful than that, and so should have some kind of damaging effect on everyone's eyesight (except Spider Man's, maybe).
Spider-Man 2 (2004)
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Directed by: Sam Raimi
Starring: Kirsten Dunst, James Franco, Alfred Molina, J.K. Simmons, Tobey Maguire, Rosemary Harris
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More mistakes in Spider-Man 2
Mr. Ditkovich: If promises were crackers, my daughter would be fat.
More trivia for Spider-Man 2
Question: How come Harry and Peter stopped living together?
Answer: While it's never mentioned in the film, the most likely explanation is that Harry, as a rich kid, grew tired of "slumming it" and decided to move back into his mansion.
Harry and Peter's relationship quickly turned sour after Peter refused to discuss Spider-Man as Harry felt Peter knew more than he let on. Peter is Spider-Man's "personal photographer," and Harry only wants to avenge the death of his father. It's not unlikely to assume Harry left to live alone because he was angry Peter wouldn't help him find Spider-Man.