I've experienced them and I know they're supposed to happen,
But can anyone explain what exactly causes the tremors?
Like, scientifically, what is happening?

Is our chest really going through what it feels like?

A few hours ago I was napping on my couch,
But I wasn't trying to WILD, When suddenly in the middle of my shallow sleep I felt something similar to the tremors I experience when trying to WILD,

And can you share exactly how you experience the tremors?
I usually felt them spread out across my upper chest, but this time when I felt them while napping it was centered in the middle of my chest and going up and down in a line down the middle, and seemed to grow stronger to the point where I became very alarmed D=