What you need:
5 stacks of any building block (320)
1 Bucket of Water
Did a hole straight down thats 2 blocks wide to avoid dropping in lava. You need to go at least down to -61.
Put water at the bottom and build yourself straight up until you hit 320. Then move slightly forward towards the deep drop you created and don´t touch the left analog while falling.
You should fall straight down hugging the pillar you created into the water you left behind and achievement is yours.Extra:
If you have Elytra equipped slowly tap "A" while you fall to also unlock
The Super Sonic achievement in Minecraft worth 103 pointsUse Elytra to fly through a 1 by 1 gap while moving faster than 40 m/s