I can't say for certain that I have been through a certifiably paranormal event. However, I remember a few things that could have been paranormal and I believe them to be so.
The one thing that stands out to me most is the day my laptop broke. I had picked it up from the desk and when I tried to step backwards I bumped into someone and then the laptop became heavy like someone was pushing it down. I initially thought it was my sister so I screamed at her. My laptop hit the ground and the screen broke clean off. I was pissed at her and so I turned around, but there was no one in the room. Its very strange because although my house is old and weird things do occasionally happen, its rare. I was 10 years old at the time and as far as my parents are concerned, the paranormal is evil and satanic. So, only recently have I begun to examine events in that house. I think it might be mildly haunted. There is definently a presence there that people can feel and it can interact physically with people. Overall, I think that it just gets a little mischievous at times. Most of the stories are humorous in my opinion. One time, at 2:00 AM, the freezer door in the kitchen swings open and everything is falls out. My dad thought it was a burglary so he grabbed his shotgun and was down there in like 10 seconds, but there was no one there. Just an open freezer door and all the contents thrown around the room. Lol, it makes me laugh at how they denied any activity there.o_0
My highschool friends have had more extreme experiences. One of my friends claims to be able to see spirits almost like how he sees normal people, apparently runs in his family. His family agreed that the ability runs in the family. The poor guy has this one shadowman that literally stalks him.

Another friend of mine isn't a psychic, but his family has had a lot of problem with poltergiests and other apparitions.
For example, the house he lives in has a spirit that he named "Fred" who causes mild problems in the upstairs areas of the house mostly. Fred would go into the toy room and throw things off the shelves. You turn your head for a minute and everything is suddenly back in place. Fred also likes raiding the minifridge by opening and shutting the door. Fred can sometimes even be seen, but no real problems from him. We do not know the apparitions full name, but Fred it is, lol.
On the other hand, his sister's house is probably the scariest place I have ever known about.... They did an excorcism of the place a while back. There were two spirits in that house. One of them benevolent, one of them very, very malevolent.

It ends up that the previous owner of the house practiced ritual black magic and had a sacrificial altar in what is now a bathroom. The sister one time threw a party in the house and locked her dog in that room. The dog scratched at the door until its paws were bloody and needed to go to the vet. After that, the dog was kept in other rooms in the house during parties and that was fine. I don't remember any of the other stories about that place. But there are photos where his sister is is carying an urn of ashes under her shirt,like she was pregnant. It was part of the exorcism process the psychic recommended, but anyways my friend took pictures of the exorcism and all the pics of her carrying the ashes under her shirt left a black mark blocking off the area where the urn was supposed to be!!! Creepy stuff there!