Alright so I vividly remember when I was about 10-12 years old, paranormal activity happening to me right before I would go to sleep at night. This did not happen just once but at least 3 or 4 times that I can remember between these ages.
It would all start out right after I had finished reading and had turned off my lamp on my end table. My family is very Christian and my Dad had me read the Bible before bed every night. Anyway, I remember just getting to rest my head on my pillow when I would feel something like a fist push up on the mattress beneath me. I was not sleeping and I was not just imagining it. I would physically sit up, turn my lamp on, and watch my bed move up and down on that spot. Like I said before, this did not happen to me just once but several times when I was young. My parents lived on the opposite side of the house and their was no one that could easily fit under my bed. I was always too scared to try and jump off and run or even just to look underneath and see what it was for fear that it would "Get me." After about 1 minute of it starting it would stop and not come back for at least a few nights. I never did tell my parents about it even though it would keep me up late some nights sleep deprived. I think it's just because it would happen so fast and when I woke up in the morning I wouldn't be thinking about until it was the next night already.
The years following this, I think I still have an irrational fear to sit on my bed with my feet on the ground and feel really uncomfortable when I do. I also still have not been able to explain why this happened to me during that age, but I definitely remember every bit of it truly happening.