Can someone explain the play to me

[Ohio Vol]

Too..when a defense is so aggressive like Alabama is being...where are the screens? Screens are aggression killers.

Screens are, for the most part, a bunch of garbage. They're extremely easy for a remotely disciplined defender to read, and most possess the athleticism to blow them up in a hurry.

Screens are far from a safe bet; they carry a great deal more risk than something as fundamentally basic as that should.