“The other thing I notice is how the arm pops right up for you to go for the armlock. If someone is taking my legs out like that, my arm is going to the ground to brace my fall. I dont think my arm would ever go UP into the air like that…
I do not think that anyone falling backward would not try in the least bit to get their hands/arms/elbows to the ground to try and brace themselves. I just dont see someone falling over backwards with their arm out straight up in the air.”
(Small point, I agree with Norm that the move was not a clothesline and has distinct differences.)
As to how the person goes down from a true clothesline and that arm movement when there is 100% on both sides: The legs are not taken out. A clothesline done full force will drive the person off their feet by knocking their head and shoulders back as they are driven horizontal and down faster than their arms can move. The arms, being lighter than the body, will come down slower thus appearing to “lift” up. In addition the driving of the head and shoulders "up and over" does add a “lift” effect. Remember too that a clothesline is a strike and does a nice “stun” job.
I know this from doing the move a few times to others in football way back in my high school days. 100% resistance from the party. In football you also usually have the added inertia of the guy moving foreword that adds to the effect.
I also know this from the embarrassing incident of running in the dark and getting taken out by a real clothesline.
So, yes the arm will be left up and available. Although there was no arm lock follow up in my football games.
Since I had done the clothesline for real I thought I would throw my two cents in I hope you guys don’t mind.