Not an original thought to me- Roy Haggard pointed it out to me a while back, in a landing clinic I was giving for Wills Wing @ Wallaby
If you've ever had a no-wind flare where you *didn't* climb a little, came to mostly a standstill, but then felt as though you got pushed over from behind... that was the mass of entrained air that was
attached to your wing and being pulled along with you ("drag"). We flare, stall, separate the airflow... but an object in motion, will remain in motion... and so that chunk of air keeps right on moving- in the direction it & you were going before it was separated from you (stall).
Roy's a hellofa smart dude
I had known/experienced the bit about feeling the air slam in to the back of us right after flaring... and I knew a slightly-climbing flare works WAY better for coming to a complete stop (I call it a "1/4 loop flare")... but Roy brought attention to the entrained air, and it's difference in trajectory in a climbing flare landing...
Shut up and fly.