Endzone vertical defence. (Flick force)
R3-7 are trusting R1 to hold the force. They aren't even considering this throw,
R1 is trusting R3-R7 not to get beat on the open (flick) side.
R6 wears an egg.
R1 is also trusting R2 to deny the upfield dump to R3.
R2 plays good D, and suddenly R1 needs to dump. It is *NOT* B3's job to contest this dump. Endzone defence is about selling out to defend only one thing each - the mark, or the cutter.
Note The back of the stack in particular needs to be aware of hammers and blades to the break corners.