I’ve often found that when I’m squatting (though usually only when I’m pushing my limits, and especially as I’m tiring, starting to near failure), as I’m coming up and pushing the barbell up with the back of my neck that I’m (mostly involuntarily) also pulling the bar back downward against my back using my hands/arms, perhaps seemingly actively working against myself but probably objectively not really.
I wonder what the reason for this phenomenon is, and if the purpose is to avoid either the bar falling off of my back to the rear, or my entire body weighed down by the bar falling forward by my waist bending too excessively forward.
I also wonder if it’s known to be a common phenomenon.