I have a brother 2 years older than me, let's call him John.
My parents told me that when he was a few months old, every night at 2/3am, John would wake up and point and the ceiling and start crying and screaming. This wouldn't stop till he was 1 and a half years old, when he was moved into my grandmother's room(she was staying with us to look after him). Anyway, while the problem seemed to go away, it came back when I was born and my parents put me in the same spot where my brother used to sleep. From what my mother told me, I would do the same thing John did, scream and cry, while pointing to the same spot. My dad decided to call in a priest to bless the house and the problem seemed to stop.
We moved out of the house a few years later, and even now, I get the chills just thinking about it.