Complete as many rounds as possible in 10 mins of:
3 Overhead Squats, 115/75 lbs
30 Double Unders
6 Overhead Squats, 115/75 lbs
30 Double Unders
9 Overhead Squats, 115/75 lbs
30 Double Unders
…
Continue adding 3 Overhead Squat reps each round until time expires.

Courtesy of CrossFit.com