As seen on the 101:
I don't know what brought the big hairs together in one car- tesla coil convention?- but isn't it illegal when you can't see whats behind you with your rear view mirror? To better highlight just how much of the view was eclipsed, here are the heads in highlight:
Ah well, if people are going to endanger others on the road, it might as well be humorous... [this image was taken in stop-and-go traffic, so no wise-ass safety remarks please.]
