I could excuse this as entirely accidental had the person running over the chicken been the lead car, and the chicken suddenly leapt out into the road. Someone else had stopped to let the chicken cross, and this person either presumed they knew better than the stopped driver and whipped around them, or they simply didn't care. I doubt people would be looking to excuse the driver's actions had the first lady been stopped for a little kid who ran out into the the road that our chicken killer wouldn't have been able to see through an entire car obstructing their vision. At the very least, the second driver acted irresponsibly, if not with wanton disregard for the potential hazards.