21-18-15-12-9-6-3 reps for time of:
Thrusters
Burpees

Men use 95 lb.
Women use 65 lb.

Notes
This workout begins with the barbell on the floor and the athlete standing tall. At the call of “3, 2, 1 … go,” the athlete will perform 21 thrusters, then 21 burpees, jumping over the barbell for each rep of the burpees. They will then perform 18 of each, then 15 of each, etc., until the last round of 3 of each. Every second counts in this workout. Your score will be the time it takes to complete all 168 repetitions. There is no time cap for this workout.

The official weight is in pounds. For your convenience, the minimum acceptable weights in kilograms are 43 kg (95 lb.), 29 kg (65 lb.), 20 kg (45 lb.), and 15 kg (35 lb.).

http://games.crossfit.com/workouts/the-open