The cows that chased you sensed the salt in your jersey. They love salt.
But seriously, I noticed the same phenomenon with antelope. They let cars pass without flinching but ran when bikes went by at the same distance. I suspect the biker might be closer to the size range of a typical predator or hunter and hence a real life threat image, whereas the motorized vehicle is in the outer size limits and has been seen many times before. tom
Last edited by Peruano; 09-26-08 at 07:09 AM.