21 Thrusters and 21 double unders x 5

OUCH!. My legs are killing me. I knew I would not be doing this one as Rx'd. I did 45lb thrusters to keep the intensity higher and tried to do 21 double unders. for some reson I would often hit the back of my head with the rope. Anyway I reduced it to 50 reps of skipping after I realized I would be all day trying to get 105 Du's. 16mins in total. which was okay. I think I will need to work on DU's in my warmup and I will add 10lbs next time.