If team sees opposing team use pass/key to play over the net,
the entire team must move backwards, away from the center.
If opposing team plays an attack through midfield, they must be in the regular lineup.
Make 3 threes:
2 trios form base 6
Coach plays ball high over the net, back players handle this ball.
Point of attention: the two outside players (position 2 and 4) must move backwards when they see the high ball, in order to defend, and then be ready for the attack again.