I was raised Christian-Catholic and this happened once during Mass...
But haven't really been to Church since I became an adult...
I just remembered I went once with my dad because it was one of my uncle's 1 year passing-away Mass... the priest was giving out the Communion wafers, other people were lining up with both their hands one of top of the other... others would open their mouths and the priest would 'feed' them the wafer.
A man took the wafer in his hands, pretended to place it in his mouth... he 'saved' it, turned around and began walking away... the priest caught him doing this and followed him... priest abandoned the altar-area and no one could really listen to what he said to the man when he was confronted or if he retrieved the wafer because they were almost at the end of the church by the main entrance... but there was some sort of verbal confrontation.
Afterwards when I asked my dad about the incident he told me that he thought the man was going to perform some sort of ritual against Christ with the wafer... but to this day we are not sure about what actually happened... why did the man take the wafer, what was he pretending to do with it... nor any further details... the priest returned and Mass resumed, but he did not address the incident.
Can anyone confirm if this 'ritual against Christ' is a thing?