Pacific is a baseline out of bounds play that gets the basketball to the top and then sets up a scoring opportunity with a pick-and-roll play.
The players set up as shown in the above diagram. When the official hands the basketball to O2, O3 dives to the weakside low block while O1 performs a v-cut to get open.
Obviously the pass can be made to O3, but that defender would have to be completely asleep for that to be open (though it does happen, doesn’t it?!).
O2 makes the pass to O1 and then cuts through a screen set by O4 and O5 in the lane. O1 makes the pass to O2 at the top.
As O2 receives the pass, O5 turns and sets an on-ball screen to run the pick-and-roll with O2. O2 dribbles to the right and looks for O5 rolling down low, a possible kick-out pass to O1 in the corner, or his own shot.
On the weak side, O3 pops back out to the corner and O4 pops out to the top/wing area.