With a continuously running clock do one pull-up the first minute, two pull-ups the second minute, three pull-ups the third minute... continuing as long as you are able.
Use as many sets each minute as needed.
Myself, Patrick, & Alfonso did this workout @ Station five and again it is a B*T#H of a workout. We all compleated 14 rounds just befor the "bell" so round 15 was a scramble to see how many total we could get before time ran out.
Patrick 14 rounds + 6 or 8 (I can't recall)
Alfonso 14 rounds + 10
Vandy 14 rounds + 10
FYI: 14 rounds + 10 is a total of 115 pull ups, in 15 minutes! All pull ups were done to full ROM, arms fully extended to chin over the bar. Well done.