I have a safety line that goes around the tree which has a tag end with some slack line. This is meant to go high above your head but if I am facing the tree you can simply move it down the tree to where it lays on the arm rest and is not in the way. There is not much slack in it sitting that far from the tree. So I wouldn't say if I fell I was going to get jerked or anything like that... more likely just swing. There isn't enough slack to free fall. Between the safety line and my harness line there is enough length for it go go along the left rail of the stand, under your armpit and the connection be behind you.

Hope that makes sense. It's like standing on the outside edge of your regular stand... not much room to fall anywhere you are almost at the end of the length of your line.