Emeka goes up to fight for the rebound with a player on the Bobcats. He can't grab hold of the ball and the Bobcats player gets it. Instead of running back on D, Okafor stares at his hands as if he is discovering he has them for the first time. This gives the Bobcats player the extra second he needs to get out on the break.
Okafor can be seen jogging slowly and with no purpose next to the Bobcats player with the ball. He looks like he just wants a little leisurely jog back and wants nothing to do with stopping the play. GIF after the jump: