The Duiker turned his head and I thought he turn more right than he did but it ended up a good quartering shot and a quick recovery...
http://www.youtube.com/watch?v=Wvs6ITj3jxE
The Impala was a tiny bit low but with his head down the arrow went through and protruded from his neck two trirds of the way up.
Both animals went less than 50/60 yards?
http://www.youtube.com/watch?v=u5GMRFgWlXs
