Ray Rice (#1; yellow) runs a shallow "in" route while slot receiver Marlon Brown (#2; red) runs a corner route |
Against Cover-2, the corner playing the Smash combo is in a bind. The #1 receiver is running through this corner's short zone but jumping the "in" route leaves the deep half safety chasing the corner route (red) from his inside landmark. Coaches and quarterbacks refer to this bind as "High-Lowing" a corner. Its the reasoning why Smash is still a standard Cover-2 beater at all levels.
To effectively play this combination as a corner, he must recognize that #1 is breaking shallow, pass him off to the hook/curl player (N/Nickel in the above image), and sink to "cushion" the corner route to give the quarterback a smaller window.
A variant on this playcall is the "smash switch" or "China" which refers to the outside receiver running the corner route and the inside player sitting in the flat.
Outside References