With reporting by Josh Horowitz

Hans Zimmer and Pharrell Williams' theme for Electro in "The Amazing Spider-Man 2" is insane... in all the right ways.

"It started with going, I wanted to put some voices into Jamie's head," Zimmer said when MTV News caught up with the composer on the film's New York red carpet. "And so I said to Pharrell, hey, why don't we write an opera? And I don't think anybody's ever said to Pharrell, 'let's write an opera.' "

If we can get more crazy music like Electro's theme, which includes a rhythmic chant repeating all the things that make Electro angry over an ominous but driving bass riff by legendary guitarist Johnny Marr, then Zimmer and Pharrell should start writing a few more superhero operas. Though if they did, it might drive them as insane as Electro himself.

"We were all in the room and it was buzzing like crazy," Zimmer explained, "until Pharell finally said 'Stop, stop! I gotta walk around the block. I think my head is exploding.' "

And what fancy recording equipment did the composer use for this epic, operatic theme?

"It's just my iphone, of us recording us as we're writing it," Zimmer added.

"High technology. No expense spared," Marr joked right back.

"The Amazing Spider-Man 2" opens May 2.