The disc was hucked and starts with the center handler.
Handler 3 goes back for the dump from Handler 1 around the 3-4 stall count. Continues their cut around if they do not receive the disc.
Handler 1 waits for a stall, and when seeing that Handler 3 did not receive the disc, makes a strike cut to try and get the disc.
The handlers without the disc (1 & 3) reset to the opposite sides that they weren't playing on. This creates a helix around the handler with the disc that allows for more resets and strike cuts.
It is stall 8 and the center handler hucks it down the field for a cutter to hopefully catch.