good question

this one is for any catholics out there; originally (at least in my experience) posed by a character in Neal Stephenson's "The Confusion."

"What if you eat it [the transubstantiated bread and wine, i.e. the body and blood of Christ] and then you got sick and threw up? When it came out, would it be Jesus's flesh and blood? Or would it de-transubstantiate on the way out, and become bread and wine again?"