CrossFit Open 2015 15.2: Every 3 minutes for as long as possible complete:
From 0:00-3:00 2 rounds of: 10 overhead squats (#43/30) 10 chest-to-bar pull-ups
From 3:00-6:00 2 rounds of: 12 overhead squats (#43/30) 12 chest-to-bar pull-ups
From 6:00-9:00 2 rounds of: 14 overhead squats (#43/30) 14 chest-to-bar pull-ups
Etc., following same pattern until you fail to complete both rounds