Continuity mistake: In the shot where Ragnar asks Floki if he can build something to lift the boats over the mountain after Floki says "Everything I do Ragnar, is for you" it then shows Lagatha and than Ragnar points at Floki and Ragnar says "Let's empty the boats." The camera then shows King Harold and you can see Rollo standing behind King Harold when he should be with the French. (00:10:33)
Suggested correction: It is not Rollo.