O3 cuts under toward the disc on the open side. D3 stays close on O3's shoulder, so O1 holds the disc.
The throw isn't on, so O3 keeps running through and out toward the open sideline. D3 follows.
With the lane empty, O4 cuts under into it. O3 starts back up the sideline toward the back of the stack.
O1 throws to O4 in the space O3 cleared. O3 keeps going to the back of the stack, and D3 follows.
O4 has the disc, O3 is at the back of the stack, and O5 is at the front, ready for the next cut.