Cool, i am fascinated by things like that. My Granny passed when i was in 4th grade - we went to her house almost everyday for my whole 10 years and i was her favorite (no, really, i was!) Anyway, a little bit after her funeral, i was sleeping. Now i am/was/always have been that person that sleeps like a ROCK. I mean nothin' wakes this chick up, sometimes not even the alarm clock! I have no idea what time it was, but i suddenly sat straight up in bed and there at the corner of my ceiling was my Granny surrounded by light, just kind of floating. I got really happy and said "Granny?" She said, "Yes it's me". I asked "What are you doing here?" "I just wanted to come and tell you that i'm okay" "You are?" "Yes, everything is alright." I smiled and said "Okay!" and fell back to sleep.
The next morning i was getting breakfast and very nonchalantly piped to my mom (Granny's daughter) "Oh, i talked to Gran last night!" "You did? What do you mean?" "Oh she just came to my room and woke me up to tell me she was okay. Can i have some Cheerios?"
On another note, i live in a very old historical apt. building and the room where my bedroom is, a couple used to live there and said no matter how 'tightly' they would make the bed, you could walk by even minutes later and you could see a 'butt imprint' as if someone was sitting on the bed. After that couple moved out, the lady who lived there before i moved in, had the apartment 'cleaned' and i don't mean with Windex... The butt print never returned to the bed, but then the lady's elderly mother died there, yes in my bedroom, but i love the place so much, i couldn't pass it up! And i haven't noticed any strange goings-on yet, but i'll let you know if i do!