One of CrossFit's standards of fitness is based on the hopper model, which implies fitness requires an ability to perform well at any task randomly drawn from a hopper. The first event of the first CrossFit Games followed this model. Exercises were drawn from a real hopper to create a workout consisting of a 1,000-m row buy-in followed by a 5-round couplet of pull-ups and heavy — for the day — push jerks. Brett Marshall proved the effectiveness of his butterfly-style kipping pull-up, winning the event with a time of 13:07. When the event was repeated at the 2013 Games, the progress of the sport was dramatically displayed, with nearly every athlete besting the winning times from 2007.