I think a key element of 'Carvering' involves chaos and usually disorientation of some sort.
It is often a 'mismatch' between two competitors (e.g., Schwabby and Guerrero), but necessary to the situation, I think, is a moment where something goes haywire: e.g., a wrestler bonks out in the third; a ref calls stalling or intervenes in the match in some other way; the score or riding time clock is incorrect; etc. The crowd plays a necessary and critical role in these moments: by getting really loud and making it difficult for said wrestlers and refs and staff to orient to the match and do what they came to do. I think the example of Sammy Brooks and Bo Nickal is actually a good example of the lesser known phenomenon of 'anti-Carvering': a talented and cool-headed star is unrattled by the environment and masters the chaos through his own unconventional technique. One can compare this, too, to 'near-Carvering': for instance when Brandon Sorensen almost got one on Zain.
I should probably go back to work.