I love the whole exchange in the beginning between Dale and Dtz when they first meet. Dtz is trying his darnest just to get away from Dale. While Dale goes on about harassing Dtz. Until Dtz plays his trump card and transforms into a Dragon thinking this will make Dale leave him alone. Only to have Dale ask Dtz if he's going to take over the planet. Because only Dale would see this as a good thing.
But, also because it developed some character into Dale and helped Dale understand get a better picture of his role as a Rescue Ranger.