I must say that, beyond occasionally exposing me to laughter, my constitutional shyness has been no dis-advantage whatever. In fact I can see that, on the contrary, it has been all to my advantage.
That's just how white folks will do you. It wasn't merely the cruelty involved; I was learning that black people could be mean and then some. It was a particular brand of arrogance, an obtuseness in otherwise sane people that brought forth our bitter laughter. It was as if whites didn't know they were being cruel in the first place. Or at least thought you deserved of their scorn.
Music makes me forget my real situation. It transports me into a state which is not my own. Under the influence of music I really seem to feel what I do not feel, to understand what I do not understand, to have powers which I cannot have. Music seems to me to act like yawning or laughter; I have no desire to sleep, but I yawn when I see others yawn; with no reason to laugh, I laugh when I hear others laugh. And music transports me immediately into the condition of soul in which he who wrote the music found himself at that time. ~The Kreutzer Sonata
The ridiculous is produced by any defect that is unattended by pain, or fatal consequences; thus, an ugly and deformed countenance does not fail to cause laughter, if it is not occasioned by pain.
As she laughed I was aware of becoming involved in her laughter and being part of it, until her teeth were only accidental stars with a talent for squad-drill.
What I find interesting is how close you can run the laughter along the seam of seriousness, and occasionally cross it, so that half the house genuinely doesn't know whether to laugh or cry. Custard pie humour is fairly universal, but at the other end, which I'm more interested in, there's the humour that hovers on the darkness, that walks in the shadow of something else, not always that obvious.