Sounds like an offensive coordinator bothered to read the rule, and unfortunately, s defensive coordinator didn't bother.
The loyal opposition called a TO when they first saw the shift. I can only assume that they assumed:
(1) MCI wouldn't run the same play shift now that they have shown it.
(2) IF they shifted into that, they would still only have the snapper, QB & RB alone at ball.
They assumed wrong on both...
MCI again shifted into the "swinging gate"
BUT
This time MCI had snapper, QB AND TWO RBs at the ball.
B had sent 4 to cover...2 would cover the receivers and two would box the QB.
The ball was snapped....
B1 & B2 rushed the QB......
B3 & B4 covered the two running backs....
The snapper jogged into the end zone.....
The QB flipped him the ball like a dart to a board...
It was a bull's eye....
The snapper hugged the ball..
The half ended....
The opponents never recovered...
...AND THE BAND PLAYED ON!!