One turned to the other and was like, "Dude, this is what we do."
The other looked at him and went, "Yeah--but what do you mean by 'do', brother?!!"
(I should have mentioned that the activites the individuals* were engaging in differed in certain ways. Yet a disinterested bystander could also have enumerated a list of similarities between these activities as well, if he or she were inclined to do so. Also, people to whom I have told this story are often interested to learn that a small percentage of the individuals in question were more or less skillful at performing their respective tasks than the others, but all of them nonetheless persisted in their attempts to successfully complete the tasks and procedures assigned to them--or, in a few cases, undertaken voluntarily--with a similar degree of enthusiasm.)
* i.e., all of the individuals, not just the two whose interaction was recounted in the dialogue sequence.