No, Chigurh was NOT actually in the hotel room when the Sheriff Bell showed up. That flash of Chigurh you see behind the door was a *symbol* of what was going through the sheriff's mind. Chigurh was NOT in the room. (If you read the book, you'll find out that Chigurh was actually sitting in a car in the parking lot, because the sheriff just missed him in the room by *seconds*. If he *had* walked in on Chigurh, he would have been a dead man. ) The image you see of Chigurh in the room was actually what the sheriff was imagining *could* be waiting for him in that room. For the first time in his career, he is really and truly afraid. You see him draw his weapon before he goes in, and he's never done that before. (Earlier in the film, he even laughs at his deputy for drawing his weapon before going into Llewelyn's trailer.) Chigurh really got to him mentally.