The question, then, remains of whether to express manner or not. It is not always easy to know, but manner is generally left unexpressed when it can be considered to be self-evident and can be inferred from the context; expressing the manner then tends to sound unnatural. Thus, "He ran into the room" can be translated as "Il est entré dans la pièce en courant" because it is slightly unusual to run into a room and so manner should be mentioned, but translating "He walked into the room" as "Il est entré dans la pièce à pied" ("on foot") or "en marchant" ("walking") is distinctly odd because it calls unintended attention to the usual way in which one enters a room. It is akin to saying in English "he entered the room walking". Only in a case where walking would be considered unusual or notable – for example, when talking about someone who was riding a bicycle – can the fact that he "walked" into the room be considered to be relevant. Likewise, saying "I'm flying to London" when on a plane is normal in English, but saying "Je vole" ("I'm flying") in French for the same situation is odd: first, because the verb is not where one should normally express manner in the first place, and also because flying is a common way of travelling to London from France.