We can't replicate Froning's genetics or his lifestyle, but we can definitely replicate his strategy.
Who remembers their first CrossFit workout?
For me it was "Cindy" in a hotel gym, and it kicked the living crap out of me. I'd never felt my muscles ache so much or my lungs burn so bad. I peeled myself off the floor after about ten minutes and said, "That was awesome!"
For every exercise, the outcome is determined by the set up. Logan Christopher shows you techniques to kick up into a stable freestanding handstand.
The freestanding handstand is daunting - nothing is keeping you from falling except your own balancing ability. There are plenty of resources to help you learn to balance at the top. But, as Logan Christopher of Legendary Strength points out, a lot of people neglect the kick up into the handstand, which is just as important.
The gymnastics-style kick up is the most effective way to get into the handstand position.