Much humor research has been based, so far, on the implicit assumption that the punch line is the only humorous element in a joke. The analysis of the corpus used for the present study shows that more than 70 percent of the narrative jokes examined include humorous elements in the form of one or more jab lines in the set up of the joke before its punch line. Therefore, it seems that humor may be spread all over the joke-text and it is not necessarily restricted to its punch line. Furthermore, a comparison of the script opposition of the punch line with the one(s) found in the jab line(s) of the same narrative joke reveals that the script opposition introduced in the punch line is always new, i.e., it is not found before in the set up of the joke. In this way, jab lines contribute to the humorous effect of the whole joke-text, but, at the same time, they do not ruin the surprise of the punch line. Moreover, jab lines included in the set up of narrative jokes may actually help the audience pass gradually from the bona-fide to the non-bona-fide mode of communication.