Quentin Tarantino's cameo in Pulp Fiction has been widely panned. I have rewatched his scenes and I agree that it is a jarring performance – when Tarantino is on the screen it feels like the fourth wall has been cracked; when the camera returns to the "real" actors it feels like we are back in the movie and not just watching actors. But I can't explain: why?
Was there possibly a deliberate directorial decision behind the feel of these scenes being different? Is the audience meant to feel jarred by the change of location and/or viewpoint, perhaps? Could the fact that Jimmie is a seeming outsider to the life of the main characters possibly have something to do with it?
Has Tarantino or anybody else associated with the movie given any indication that the change of style/pace/feel of the scenes set at Jimmie's house is due to anything other than Tarantino's acting skill (or lack thereof)?