Replying to Blender

There was a thread a while back about the "blender", (for those who don't know, the blender is when you are about to spin switch and you look over the opposite shoulder, i.e. spinning left and looking over your right shoulder.) I remember people saying that it was ugly, impractical, and dangerous. I understand the first two, but I can't see how it's dangerous. As far as I can see, it's basically just adding another blind rotation to the spin. Thanks.