Three Gates, One Open

Starting position

Four bags, three gates between them, two hidden defenders, three attacking lines. The ball comes off a feeder — and at the last second the defenders shut two gates. One is left, and the three of them have to read it fast and go together. No time to pick your line in advance: heads up, scan, talk, go as one. Exactly what a real defensive line does to you — you don't know where the space is until it opens.