Filthy Fifty (in reverse) Workout

For time:
50 Double unders (or 150 Single Unders)
50 Burpees
50 Wall ball shots, 20 pound ball
50 Back extensions
50 Push press, 45 pounds
50 Knees to elbows
Walking Lunge, 50 steps
50 Kettlebell swings, 1 pood (or DB Swings #35)
50 Jumping pull-ups
50 Box jump, 24 inch box

Subbed DB Swings and did SU. Was able to get 5 or 6 non-consecutive double unders though; getting closer with my form!