Thanks Lars I tried this in my garden today and it worked !!
I put the Vesc in PID speed control mode, and in the motors settings I set reverse erpm to 1500. In reverse throttle it unrolls really slow and if you try to pull faster than the motors unrolls the vesc stop sending current and it starts to freewheel exactly the way I wanted !! Amazing good thing is when you release the throttle it brakes strong when you pull the cable, perfect to unstuck the cable if it’s stuck in rocks or in vegetation while walking.
Thanks for your help guys, tomorrow I’m trying it with some friends, let’s see