It just occurred to me (on the can, i might add) that with the various states of matter all being driven by pressure, it might have necessary characteristics to be classified as one.
On a side note, I wonder what pressure the intestinal tract is rated for. I have a certain potato-based experiment I’d be interested to know the outcome of.
Peristaltic, in fact that’s where the term comes from. You can type “peristaltic pump” into a search engine to see lots of descriptions and diagrams.
Well, I kinda had the impression peristalsis loads the cannon, so to speak, while pneumatics fire it.