I'm 45 years old and always tried to keep fit, when I was around 20 years old I used to do pull-ups from my parents loft ladder. One day I set the ladder up across the hatch as usual, did a couple of reps and as I looked up I saw a green glowing cube shaped orb - this looked just like a green dice hovering mid air in the darkness of the loft. I shouted for my girlfriend who ran up the stairs and she saw the same thing, we were mesmerized. I told her to stay there while I ran to get my brother but she followed as she was very scared. When we all returned it had gone. I've never seen anything like it since but other supernatural things have happened over the years while I have been with other friends or family in this house.
Other occurrences have happened starting around the age I was 8. Things flying across the room, also, the same ghostly figure moving across the landing - always in the same direction - like a shadow and as you look it's gone and witnessed by all family members. This hasn't been seen for a number of years though.
Other people who've seen similar things will understand. I will add more info soon but don't have time right now but will be back soon. This includes things moving around, disappearing and turning up in obvious places - more on these soon.