So you don't need the roll to Disengage, but you are a bit high in the tree. To avoid all injury IF you are still going to jump out, you need an Strength (Athletics) TN10 or a Dexterity (Acrobatics) TN12 roll to avoid the 1d6 damage from jumping down more then 3 meters. If you just want to crawl down the tree you don't need a roll...