Possessed by the devil

A few yrs ago, my mate Joe thought it would be a great idea to play a trick on his stricked roman Catholic sister by having a little smoke gun hidden under his jumper. His sister was conviced he was possessed by the devil , because he liked heavy metal (bible bashes can be a bit strange). And she had a little bottle full of holly water around her neck at all times.
So he put on Black Sabbath and turned it right up knowing his sis would flip and storm into the room. Right on queue his sister stormed into the room to the sound of load music and my other mate screaming "he's possessed. look at his eyes, look at his eyes". With that his sister grabbed her bottle and chucked the water over her brother while chanting something, and the smoke just billowed out of her brothers jumper. The scream that came out of her was unbelievable, she ran out into the street screaming, "my bothers the devil". I was crying, I thought my ribs were going to pop.
The shite that followed wasn't so funny thou, seeing his father was and still is the headmaster at the local Catholic school.
A good thing that came out of it, was his sister pulled away from god and became one of the lads.