Set up of spread.
Primary has 3-4 seconds to make a cut or clear. In this case, she sets up an out cut in to an in cut.
In cut from primary...
Into a 7 cut! Where she gets the disc on the "betty" break. Other cutters expect their teammate to get the disc, so they push up field.
Everyone else pushes up field, and 2 has space to make the continue under cut.
Cutters continue pushing up field, handlers and cutters push up trying to stay WIDE of the play.
Because people are pushing wide of the play, 3 has a chance to make an in cut in the middle for yards.
Four is setting up a continue cut in the endzone to score!