My breakdowns took on an immediate form, such as instantaneous expulsion of stomach contents, and often were over as suddenly as they started, but with me running for cover.
... usually embarrassed.
I don't really call that vomiting, though. I think of vomiting as something that happens when there is a problem within my stomach, which is quite rare.
Chucking, to me is the same as what birds do. If you ever startle a bird, they immediately shit, then take off, flying. My reaction to some things causes a similar function. Lose the excess weight and run!