At the moment, I'm reading The Hobbit, and I just watched the first movie, The Hobbit: An Unexpected Journey. It was fun to note where the movie was following word by word the book, and when it gave itself more freedom.
However, there's one point that baffles me a bit: the encounter with Radagast. Radagast seems to live within Mirkwood, notices quite a number of strange dark things in the forest, and visits Dol Guldur, where he meets the shadow of the Necromancer. After seizing the Morgul blade, he escapes swiftly aboard his rabbit-led sled.
At the same time, Thorin's company is still far west of the Misty Mountains, somewhere between Bree and Rivendell. They come across the three trolls there, visit their near-by cave... and that's when Radagast runs into them, on his sled, as if he was still running from the Necromancer's minions!
How is it possible, while Thorin's company is far west of the Misty Mountains, and Radagast is far east, within Mirkwood?
The trip across the Misty Mountains is a long and dangerous one, even for a wizard accompanied by a party of warriors, as we're shown later. I can hardly believe Radagast crossed the mountains in what seems a blink of an eye.
Is there something I missed to explain this course of events?