Achievement fixed 30/10/2015Start up a game on Goat Z - Before Outbreak and apply the mutator 'Anti-Gravity Goat'. You can do the after map though there will be zombies about then.
Head over to the Whiplash area and jump up on the big long slide at the back. Walk to the top and upon sliding down the goat will go into ragdoll mode (If it doesn't press
to do so) and slide down.
As you leave the slide press
to turn on the Anti-Gravity mutator and fly forwards over the whole Whiplash area towards the umbrella and the small paddling pool next to it.
The paddling pool is your target, whilst still floating try to line up over it as best as possible and press
to turn of Anti-Gravity and guide your goat into the pool.
The achievement unlocks once you land into the pool.
Here's a video (Sorry for my inept jumping)