Make the call and the signal

[mick]

Originally Posted by Jim Henry

Although it was not intentional in my judgment, I see a shot to the head as a flagrant foul. I call a flagrant foul on the A1 player, and he is out of the game.
[....]
Your thoughts?

I have never called a flagrant foul, but in your case,

A1 and B1 go up for the ball. A1’s arm comes down hard on the head B1 and knocks B1 to the floor.

it looks like a common foul to me, since you wrote that it was not intentional.

I've seen plenty of accidental blows to the head, face, ears, hair, but without judging intention, I just could not go flagrant ( -->suspensions --> paperwork) for your described contact.