1) The camerawork in the bar scene establishes Jack's frustration through long shots and medium shots that track his body language as he walks through the hotel. Close-ups are then used to exchange dialogue between Jack and Lloyd.
2) The editing cuts between Jack and Lloyd when they speak to imply Jack's deteriorating mental state, as Wendy does not see Lloyd. Mirrors are also used to suggest Jack is speaking to himself.
3) The mise-en-scene features warm orange colors that represent heat and hell, relating to the theory that the hotel is hell. Lloyd's red clothing and sudden appearance also support this.