Line holder(A) has a buddy(B) that takes a trip off of his line, and adds it to their line. Pilot A picks up a trip taking him to ALV+15, where he can no longer pick up out of the pot, and then swaps his original trip back to his line allowing him flying well above max pickup of ALV+15. Pilot B then just picks up a trip to get to ALV+15.

What it allows is someone to use the swap board and its functions; which do not have a max pickup limit, to allow someone go park a trip for the WS award function that looks at your current line and ALV+15.