- drink from a water pump and count how many times it takes for the yellow stuffed, orange stuffed, red stuffed/vomiting statuses to appear
- it's 66 times (66x50=3300=vomiting) plus a few to make up for digestion until you vomit
- repeat right after vomiting, you can again drink 66+X times until you vomit again
conclusion: vomiting currently completely empties your stomach