tutaj macie artykuł o najbardziej znanych regurgitatorach:
damninteresting.com/retired/hadji-ali-and-the-regurgitators/
fragment wyjaśniający "trick":
"The trick of a regurgitator's act is simply a matter of controlled vomiting-- learning to exercise the muscles of the stomach and throat at will, particularly the esophageal sphincters. But some performers were known to use substances to induce violent stomach spasms while retaining firm lip control. And of course you can't classify vomiting as entertainment unless it is executed with great flair and style."
iście sadolowe...