Found this nice little spot earlier today.
You get kinda stuck on the side of the tree, and its positioned perfectly so you can target pretty much anyone at the market AND the guards will NOT attack you and blow you out of the tree.
If you try this in the other tree, the moment you attack someone, the guards will do a knockback on you, throwing you out of the tree, and killing you.
But not in this tree
This here is the Killing Tree.
Heres a video of how it works
Enjoy!