A sample of how complex zone pass coverage can be

[MightyGiants]

Scott Shafer gives the pass coverage responsibilities of the nickel back in the robber cover 2.   Scott is the DC at Western Michigan.

http://www.youtube.com/watch?v=RbbSHiS_lmo

[MightyGiants]

When you realize just how complex zone coverage can get, it's easier to appreciate how some corners do better in a M2M scheme.  In a M2M scheme, responsibilities are greatly simplified.