The trick is to feel when the neck breaks and drop the chicken at that point, then the head will just flop around while the chicken jumps and flops.
The thing is that Sessions has been flopping around for quite some time already. Question then becomes, will he flop around even worse when he wrings his hands off?
My Mama used to grab them and crank them up like starting the old Willis, she kept the heads while the chickens ran around the yard till they bled out.
Probably why the sayin, "Running around like a chicken with its head chopped off." became popular in the South. No chopping though just cranking. A live fryer sold for a dollar in the late 40s.