If you're not familiar with the DB glitch you can scroll through Matt10's thread that has a lot details about it (videos, screenshots, etc). Basically, late in the game the CPU defaults to aggressive pass coverage (same thing you can edit with the adjustments option). In turn, the DBs allow themselves to get beat deep time after time making ridiculous, unrealistic mistakes. So pretty much when you're trailing late & have to attack vertically you're going to get what you want.