When i was young, during one of those catholic retreats, during mass when the priest was giving out the consecrated bread something happened.... for one lady, upon receiving the bread, the bread turned into flesh and blood right inside her mouth, and i am sure this was no setup, it was taken in video too.
They explained it as Jesus's flesh and blood and it was a sign.
As i have moved away from my parents, i have more or less become an atheist, but that incident still remains in my mind and i cant figure out a logical explanation.