Today, I did a backward hand-foot crawl (aka bear crawl) backwards up an incline. At a jog.
Then I let some college football players try.
Fail. One had to stop on the way up, and, even then, did not have good technique going. The other could not even do it. Technique was even worse.
I will remedy that in the future.
They said, after trying it themselves: “you make it look so easy!”