I'm not gonna lie, it does look like a horse and a man riding it. Unfortunately, it looked like he was holding a torch.

Also, the book of Revelation wasn't ever ment to be part of the Bible, it was a kind of "secret newspaper" about Emperor Nero and what he was doing. It was entirely symbolic, to keep Nero and his men from knowing what it was actually about - which was, more or less, turning it into a Holy War so the Christians could no longer be persecuted as they had been by Nero.