Well faking the kneel down is not a foul, just an act that causes the ball to become dead. A spike will not automatically become dead, i.e. it could hit a foot or leg and go up in the air, ball still live.
And finally, that was not even a half decent fake spike. Only a few Team B players seemed to let up.
What would you do to the runner who acts like he is going to run OOB but then turns it up at the last millisecond and tightropes the sideline? Call that dead?
