I hear noises first, basically just someone talking about random crap, and it's usually in my right ear only. And I see someone or something in the right side of my vision spectrum.

And then they go to the center, and the images are usually kind of frightening, like zombies and deformed people and stuff like that, which leads me to sometimes believe I am clinically insane.

They are often pleasant though, just genuinely strange and random images floating in the center of my vision.