Crossfit Games 14.5

Here is a fun one from the Crossfit Games:

21-18-15-12-9-6-3 reps for time of:
Thrusters at 50% of your body weight
Burpees

This workout begins from the standing position with the barbell on the floor. Every second counts in this workout. Your score will be the time it takes to complete all 168 repetitions.  Quickest time wins!

Here is a link if you would like a demonstration.

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