I don't usually upvote jokes on HN, but when I do, I provide some actual content in the same post. OT (obviously): This is an example of a facet of humor I fin

I don't usually upvote jokes on HN, but when I do, I provide some actual content in the same post. OT (obviously): This is an example of a facet of humor I find rather difficult to explain. Most comedians pull this trick once or twice per show - the good ones, more often. You take the current topic of conversation, and link it (in a somewhat skewed way) with some previous joke. Somehow, this has an amplifying effect on the old joke, which continues to get stronger as you do it a few more times (to the same target). Anybody know of an explanation / name for this? (Did ... did I kill it?)