Mindful Humor?

My question for today is how closely locked mindfulness and equanimity are. Further, does mindfulness or equanimity--in very precise moments--exclude humor, or maybe more accurately, laughter? Is there a significant shift in mental states between the precision of mindfulness (perhaps more synchronized cortical functioning?) and whatever inconsistency in comparison that sparks laughter? I think it's likely that this can be answered by compiling existing neurophysiological data rather than needing to create more.

But seriously, folks...if samatta leads to tranquility, that tranquility is different from humor and laughter. In my own experience, it seems that there is a sort of blissful sense of possibility, like a nimbus of almost-laughter, that sometimes accompanies mindfulness meditation. Laughter itself seems like a distraction from focus, from single-mindedness and the drift into depths of equanimity. But laughter feels somewhat distinct from that nimbus that is like potential-laughing-with-me. I wonder about whether that liminal feeling full of possibility is like the anticipation that precedes a punchline. I think it is. And if that is so, if that is like Jeffrey Schwartz's equipotentiality (concerning potential brain states/responses) is there a clear and obvious bifurcation between moving towards laughter and tranquility?

It seems to me that, in an Abhidhamma sense, mindfulness may put a sharp edge on consciousness that can accentuate humor, but there is a significant shift between a moment of mindful precision that sets up humor and some actual conception or feeling of humor in a following "moment". (I'm assuming we're already ruling out nervous laughter and the type of humor that simply reduces cognitive dissonance, "manufactured laughter", "purposeful laughter".)

In this question, I think we're getting at the differences (or potential differences) between sahaj samadhi and something along the lines of nirvikalpa samadhi. In one sense, samadhi is samadhi. In another sense, oneness is eternal and ever-present and unchanging while in another, it seems eternal and ever-present and fluid.