X-Force finally figures out that Deadpool has duped them into a meaningless conflict with the Kingpin (mostly when DP does his level best to allow the Kingpin to escape during an all out brawl). See, Deadpool is trying to get somebody, anybody, to inject him with a serum that will negate his healing factor and allow him to die. He tries to get Kingpin to do it. He tries to get Tombstone to do it. He tries to get Daken to do it. But it is finally his good buddy Bob that actually does it.