"Snake Eyes" Workout

AMRAP 12:
3 Power Snatches 43 / 29 kg
3 Chest to Bar Pull-ups
3 Box Jumps (30"/24")
6 Power Snatches 43 / 29 kg
6 Chest to Bar Pull-ups
6 Box Jumps (30"/24")
...
Add 3 Reps Each Round