As we all know, mass can be a social minefield (especially when you only show up at Christmas - when did they change the responses?!).
From the sign of peace to getting communion and passing the collection plate, there's a lot that can go wrong.
The lads from the Irish Take with Fupin Eejits have put together this funny video which takes you through all the ecclesiastical faux pas to avoid.
Genuflecting can be awful hard on the knees.