By installing this mod for MC:PE 0.17, the mobs will be able to fly in the truest sense. If you frequently use a bow as a primary weapon, then be sure to download the Arrows of Levitation Add-on. Mobs will fly in the sky, if your arrow hit right on target. The effect of levitation lasts exactly 20 seconds, and then the enemy (or other any creature) fall to the ground.
Moreover, falling take a certain amount of health. But if you decide to join the battle with the skeleton, then get ready to experience this effect for yourself.