Lionsgate

When a movie is about a guy who is suspected of killing his girlfriend and then grows horns that make people tell the truth, you expect it to be a little strange.

But I think it's safe to say that nothing could have prepared us for this exclusive trailer for "Horns" starring Daniel Radcliffe, which MTV News is debuting as part of San Diego Comic-Con.

Earlier previews teased Radcliffe's transformation into the devilish anti-hero of the story, but none of those looks included pitchforks or making competing news crews fight for an exclusive interview.

"Horns" opens in theaters on October 31.