CrossFit Games Open 13.5

Open 13.5 
Complete as many rounds and reps as possible in 4 minutes of:
100/65 pound Thruster, 15 reps
15 Chest to bar Pull-ups

If 90 reps (3 rounds) are completed in under 4 minutes, time extends to 8 minutes.
If 180 reps (6 rounds) are completed in under 8 minutes, time extends to 12 minutes.
If 270 reps (9 rounds) are completed in under 12 minutes, time extends to 16 minutes.
Etc.

48 reps. Chest to bar are hard. 1st time doing them in a workout. The open was awesome!