Complex sentence: That night however, Zack gets up and sleepwalks around the booby traps and when he enters the lobby, Mr. Moseby catches him and attempts to make him stop rearranging.
Split into simpler sentences: That night however, Zack gets up and sleepwalks around the booby traps. When he enters the lobby, Mr. Moseby catches him and attempts to make him stop rearranging.