I took my son out the other day trying to shoot his first with a bow. We saw lots of action and prerut activity. There was a buck about 50 yds away and he started to grunt and was real interested in something on the other side of the fence that we couldn't see. He then started a continuos grunt that easily lasted 30 seconds or more and got louder as it went. At the end he would lunge or false charge at whatever was on the otherside of the fence and brush. This happened 5 or 6 times! I have never heard a buck do this before. Is this what the buck roar call is supposed to immitate? Anyone heard this before?