Actor Robert Downey Jr. says he was "pretty terrified" filming scenes with Jared Harris in "Sherlock Holmes: A Game of Shadows".

The 46-year-old reprises his role as the fictional British detective in the movie. "The stakes were so high, in every scene, and there were complicated camera shots. It's pretty terrifying.

What Jared kept pushing toward wasn't personal. It wasn't like, 'I don't want to be embarrassed. I want to do a good job...," contactmusic.com quoted Downey Jr. as saying.