Coach Mike Burgener is one of the top Olympic Weightlifting coaches in America. In this clip from his CrossFit Oly cert on May 24, 2008, he covers the end of the first pull.
There are three pulls in weightlifting. The first pull is the positioning pull. The second pull is the explosive jump to full extension. The third pull is the aggressive pull-under against the bar into the receiving position.
The end of the first pull is higher than many athletes realize. Patience is required to stay over the bar all the way up. Jumping too early inevitably leaves the athlete forward. This is true for both the snatch and the clean.
At the end of the first pull, the hips should be back, legs almost straight, lats engaged.