I'm sure it's fun and I would even do it of we had classes around here, but is it really that natural? I have never had to do a lot of those movements in my normal life. Normal movements include reaching for stuff on high shelves, walking, walking carrying a load, running, running from bees, riding a bicycle, stooping to clean the floor, pushing a vacuum or broom (and until you've had a hysterectomy you have no idea how much that works your abs), scraping a bow across a fiddle for hours, jumping as high as possible to see if there's anything good in a Dumpster. But not too often have I walked like a monkey on all fours or skittled along on my fingers holding a plank.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 160 x 2