this is one of my absolute favorite bltizes to bring the HEAT down on the QB and those who love to roll him out. because i run this so much...i have place the Cover 4 in my audibles. here's the set up.
Dollar:
Dbl Corner Pinch
-Freeze the D
-BnR
-Spread/Crash the D-line In (down)
-LBs in Hook Zones (yellow)
-Manually control a LB or Safety to watch the deep middle or sidelines
-Pass Commit
*Note: i do the first 3 steps immediately after the huddle and BEFORE they hit the LOS. i also mess around with a variety of set ups (i.e. both LBs in Buzz Zones (purple), 1LB in a Buzz Zone, 1LB blitzing, both LBs in a QB contain, both #3-#4 CBs in Buzz Zones (purple)...dropping the NT back in deep coverage etc.) to confuse my opponent. this play gives my "Dirty Black-Birds" many pics!