A 'tree zip' is something that occurs seemingly at random when mario grabs hold of a palm tree in sand kingdom. Tree zips are when mario shoots in a random direction whilst holding a tree. For example, you could grab onto a tree and end up high into the air or clipped into the floor. There is no real setup for a tree zip, if you want to get one then you'll just have to repeatedly grab onto a tree and pray
Low% runners have hoped someone may be able to get a tree zip high enough that they can land on the top of the inverted pyramid. This would be beneficial to many low% categories but as of right now, no one has been able to get such a zip.