did you ever think about how we have a digestive tract that starts at the mouth and ends at the anus and it is essentially one long tube? so you could theoretically put a high pressure hose at either end and water would shoot out the opposite end. of course there are muscles designed to close off portions of the tube along the way but with enough pressure or a muscle relaxant they should not be too much of a problem. don't try this at home though but it is something to think about.