Essentially, QB's were getting the ball out in 2-3 seconds. So Heacock decided it didn't make sense to waste a 4th DL rushing when they aren't going to be able to get there that fast and just add a DB to coverage to take out a passing window.
Sorry I'm a little testy about misinformation this morning, I have a Construction client from Idaho arguing with me about how he paid a couple of his workers because he "saw a video about it on you tube" and the video is completely wrong.
I hate that crap too. Tell him you have forgotten more than he knows. That always helps