In as few sets as possible:

120 Pull ups

Coach’s notes:  For this workout start by doing as many pull ups as you can and record the number.  Rest 2 minutes, then perform another set of as many pull-ups as you can and continue this until you reach 120 pull ups.  Kipping pull ups are preferred, however if you have not learned to kip yet, substitute assisted pull-ups, but not jumping pull-ups.  Post the number of sets to comments.