If you’ll notice on this particular run play inside, up the middle, the HB runs up the mid and clearly breaks the first down plane, then winds up going the negative direction.
I wonder why they did not award him the first down, since he clearly got to the first down marker!
https://paydirt.myfootballnow.com/watch/3655#663237

I don't know why, but the RB goes backwards on his own, therefore is down where tackled. The forward progress rule does not apply here. This could possibly be a bug.

Who does this RB think he is Jim Marshall ????

That’s too funny punisher

It's Michael Jackson moonwalking.

That's the Legendary Black Beast of Arrrghhh! The Killer Rabbit of Caerbannog! Run Away! Run Away!

....and Brave Sir Robin, bravely ran away.