A myriad of sitchs

[JugglingReferee]

I do not believe that A2's screen was set within the field of vision of B1. If it was, B1 would most surely have had some sort of movement, or raised his arms or something. It's a natural motion to do something when contact is known to be imminent.

B1 certainly was not backpeddling. I rarely see anyone backpeddling while playing defence. It's just not good defence at all. You can't move nearly as quickly as you need to. B1 will likely shuffle-step or run with his head turned to A1. Smitty's comment "Does someone have to be running backwards to..." is what I had as well.

A2's screen accomplished it's task. Screens at some point have to be blind, otherwise why ever set a screen at all if B always knows where it is? If B1 happens to see it, or another B player communicates to him it is there, those are times where he will try to avoid the contact. Otherwise, he will keep playing as though he's playing good defence. We can't expect anything less from B.

Is B supposed to look up every now and again and determine if he's going to run into anybody? Maybe. But the purpose of the screen was met. B1 was taken out of the play. Unfortunately, so was A2, likely because of the conservatin of momentum. mass[b1] * velocity[b1] = mass[a2] * velocity[a2]. I guess B1's velocity made up for, and them some, A2's mass advantage. (Pun intended.)