"Yes! Well, that's the most commonly known type. They can also be auditory, or tactile and I think there have been some cases of gustatory hallucinations, but I don't know as much about those. But at any rate, if you're hallucinating, having out of body experiences and spontaneously falling asleep, you might be narcoleptic."

At the question, he peers back up at Gamzee for a moment before looking down contemplatively, "I think I did once, but I'm sure it wasn't a narcoleptic hallucination."