The latest instant classic in the AFC's best running rivalry rested on one play, and K.C. defensive coordinator Steve Spagnuolo took a risk.

As the Chiefs often do under defensive coordinator Steve Spagnuolo, they brought a heavy blitz, and Allen had to backpedal away from defenders. He threw up a wobbly prayer deep downfield, and it was nearly answered by tight end Dalton Kincaid, who just missed hauling in the heave and keeping the Bills' comeback hopes alive.