I would find a way to depict a character entering a five-dimensional doorway. The halls would stretch past him at crazy speeds and crazy colors–I would find a way to depict colors as sounds visually and vice versa. Hands coming out of walls and rain raining up onto the ceiling from the floor of the hallway. Then the doors of this portal hallway would multiply to more doors until the hall is made of doorways–the paradoxes resulting would be visually stunning. My character’s goal is to find the original doorway so he can get back to his dimension.