In the event that you were so greedy and impatient as to cut off a piece that was too big, you could simply open the grapple and let it go.
I've done some trees that were growing in an area where I could just grab, cut, and let go ,not having to worry about how they fell.
Most often I grab, cut, and set the piece either on the deck of the chipper (if it's a limb) or right into a truck bed (if it's a chunk of wood. I even feed the chipper with it. No ropes, no dragging limbs, no mini loader or machine to move logs, no dents in the yard, and the only area that needs raked up is where you're chipping. You can't imagine the time saved. It's why I have only 1 guy, that used to be my employee, cleaning up. I subcontract his little business and I don't have to pay workman's comp. All he owns is a truck, chipper, and a rake.
The thing on the bed is a man basket. It stows in a custom made bracket (which I can remove from the bed if I need space to haul anything up to 14'). I sold my 75' elevator so I needed to have some means of getting myself up for certain situations that the grapplesaw doesn't like (pruning and thick bushy trees like pines). Every piece of equipment has limitations but the grapplesaw has only a couple and having the basket covers them. I seldom use the basket.
Those were good questions.
