Looking at the replay, it was a basic inside zone run. The Vikings were in a tight I-formation, the flow started left and most of the Texans defensive front went with it. Peterson took a deep handoff from Favre and seemed to be running full speed when he hit the hole.
Mario Williams and Fred Bennett were on the backside and are probably the corner and end that Kubiak was talking about. Mario took the outside shoulder of the right tackle which allowed the backside cut. The receiver lined up just outside the tackle came over and helped screen Mario away from the play. I'm guessing that Mario was supposed to crash inside when he saw the fullback lead left.
Bennett was lined up tight on the wide receiver just outside the tackle and got sucked into that same double team. He took a bad angle to the hole which prevented him from making the tackle. At the second level, Xavier Adibi was in the best position to make a play but he got sucked in to the flow to the left side - with six other defenders.
http://www.examiner.com/x-778-Housto...for-prime-time
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In case anybodys still interested, here's a comprehensive analysis of the Texans busted play vs AD/Vikings on the 75 yard TD by AJ from the
Examiner.