I watched a whole herd of deer running across a field of grass and cactus. They were headed right for the road where I was parked, but suddenly saw the pickup and turned straight for the fence. I get ready with the 100-400L IS and grabbed a couple of shots as they lept over the fence. The buck was huge and cautious. Turned away and went another 100 yards away to jump the fence. I did shoot thru the windshield but that turned out to be ugly with bug guts and distortion getting the best of my $1300 lens! Smart buck. No wonder he has lived to become a big guy!