Well, the overall tone of Pulp Fiction is a complex blend of coolness, chaos, and dark humor. The last scene plays a crucial role in maintaining this tone. When Vincent and Jules leave the diner, they do so with an air of nonchalance. This nonchalance is a key part of the movie's tone. It shows that they are used to the craziness that has been happening around them. It also gives a sense of mystery as to what will happen next to them. This is in line with the movie's general vibe of unpredictability. The last scene doesn't resolve all the questions or tensions, but rather leaves them hanging, which is very much part of the edgy and engaging tone of Pulp Fiction.
The last scene of Pulp Fiction contributes to the overall laid - back yet edgy tone. As Vincent and Jules stroll out of the diner casually, it shows that despite all the mayhem they've been through, they're still these cool, non - flustered characters, which is in line with the movie's overall style.