This morning I fired a very stable shot from quad sticks at a range of about 80 yards and missed a fallow Doe completely. Alarms bells stated to ring as I didn't get that standard audible thump as the round slammed into flesh and bone. After a quick check around of the local area to see if the beast was clipped, we back tracked along the line of sight and there was a clear strike mark on a branch no bigger than your forearm! The branch was around 50 yards down range and I didn't even see it in the morning gloom!
So lesson learnt - Although you can check most of the distance to the target you may not see all obstacles on the bullet arc. This was a first for me, lets hope it doesn't happen again.