on the way in to work in the morning, as it was today, I usually turn on both front and back blinkers to make myself more visible to traffic (on the fairly low-traffic route that I follow most days). One amusing visual effect is that road signs, reflectors on guard rails, etc. provide this interesting array blinking brightly back at me for a hundred or two meters up the road. An added bonus this morning that I suspect was related was coming upon a good-sized buck deer beside the road up ahead of me, staring intently in the direction I was heading, I think being puzzled by a pair of road signs blinking at him. My bike was quite close to him before he finally noticed me and bolted off into the underbrush.