"Don't worry, that'll stop eventually." Zack said.  "When Danny first found me, I was stuck halfway in the floor."  He cleared his throat and said "Now that we're all awake, let us go over our powers.  We all have the ability to go ghost, become intangible, turn invisible, fire ghostly blasts from our hands, and possess others.  However, we each have an additional ghostly power.  For me, I can duplicate myself."  To show what he meant, he split into two.  "For now, I can only split into two." he said.