I have had a few experiences in my life, and will be recounting them over the next few days.
This particular experience happened when I was about 7 or 8 years old. We (my mom, younger brother and I) were over at my aunt's house for an afternoon visit.
One thing you must know about my aunt is that she has apparently always had a spirit following her. She has moved house plenty times, but he comes with her always. I obviously didn't know this as a young child. I don't think I would have gone to her house if I had known!
My brother (he was about 6 years old then), my cousin (also 6 years) and I decided to play hide and seek. My mom and aunt were sitting outside on the front porch. My cousin and I were to hide away, and my brother had to count to 10 and find us! We hid in my cousin's bedroom. There were 2 single beds against each side wall of the room, and we each hid under 1 of them.
We could hear my brother walking around the house looking for us! I remember how much I was enjoying this little game and holding in a giggle! We heard my brother coming down the passage, and at the bedroom door, he stopped dead in his tracks, and sort of, flew backwards into the wall! He got up real fast and ran outside! My cousin and I couldn't understand why he hadn't come in looking for us, and went out to find him as we had gotten bored of hiding for so long.
My brother said that when he had got to the bedroom door, he was about to go in, and something pushed him so hard, he fell over and hit the wall. He was really frightened and had to get outside!