I went to a convent school and during one school mass was in charge of some music stands, I wasn't sure where they were meant to go in the chapel so I asked one of the nuns (who was sat rather conveniently in a pew) where the stands were meant to be- "Sister, where would you like the stands to go" I asked, there was no reply, so I repeated my question thinking she had misheard me, still no reply. By this point I wasn't sure what to do - perhaps she had fallen asleep so I tapped her on the shoulder, almost shouting, "Sister, Sister" but she carried on sitting there, at that moment I realised that she was praying and the other music prefect stood beside me was wetting herself with laughter, I then ran out of the chapel with tears rolling down my face (from cry-laughing) wondering weather to go and apologise or act as if it had never happened..... At that moment she emerged from the chapel, winked at me and pointed at where she wanted the stands to go, I apologised to her to which she replied that mistakes happened, quoted some irrelevant passage from the bible and skipped on! My embarrassment didn't end there - after telling all the teachers what had happened I was asked to go and start the Hail Mary's in front of the whole school (which our chaplain though was hilarious) I got the giggles mid prayer as all my friends made silly faces at me, and even my chemistry teacher had fun overly praying.... I've never lived that down - and it was over a year ago!