John Pelphrey ran this Carolina backscreen action while the head coach of the University of Arkansas. What I love about this play is by have 2 set the backscreen to 4, a lack of communication will result in one of three outcomes:
1. Lob to 4
2. 2 will be open as X2 helped because X4 was nailed on the backscreen
3. X5 is forced to help on 2 and 5 can flash for an elbow jumper or iso-drive to the rim.
If none of those options are available the pick & roll finishes up the play. With the floor spread and the pick so close to the baseline it will be difficult to help on the roll of 5 if X5 is caught helping X2.