Two-deep shell — the safeties split the deep field in halves while five underneath defenders squeeze everything short.

The call

• and each own a deep half — nothing gets behind them, ever
• and @CB2 sit in the flats and take away the quick game
• , , wall off the hooks and carry crossers between zones

When to call it

• Teams living on quick outs, hitches, and flat throws — the flats are taken away
• Obvious passing downs where you want everything kept in front

What it gives up

• The deep middle between the safeties, and the sideline hole behind the flats — a good Smash team will test both
• A three-level flood to one side stresses the flat defender — / have to sprint to help

Coaching points

• Flat defenders: eyes on the QB, funnel receivers inside to your help
• Safeties: stay deeper than the deepest — depth first, drive second