This content is exclusive to the PC Version. 
Do 10 front flips in one trick.
As Flipping Hard, but with ten flips instead of three. Find a really high place to jump from, or just use the Anti-Gravity Goat mutator.
An even easier way to do this without requiring any mutators is to try this inside the Low Gravity Testing Facility. Simply make sure you land on your hoofs when you touch the floor.