I only have one, almost a year ago to the day. My brother threw a birthday party for his 2 yr old son. After outdoor games I was pretty drenched and asked him if I could borrow a dry shirt. We go in his room upstairs and 20 seconds later his very high strung 7 yr old niece starts slamming his bedroom door from the hallway with my nephew's toy hockey stick. So she gets yelled at, she could have easily chipped the door up she was hitting it so hard, so then we go downstairs.
About an hour later I go to use the bathroom in the basement. Because of the baby there's a child safety over the knob so you always have to pull it shut, listen for the click, and follow up with the push test to make sure it's shut. I go down the steps, go into the bathroom, then say to myself "Ok you might wanna lock the door there's a lot of people upstairs!" I turn back to the door and go to lock it...with my hand still on the knob and my face 2 inches from the door there are 2 hard significant knocks directly in front of my face on the door.
I immediately roll my eyes and open the door thinking to myself 'Hockey stick!' Nothing. My first instinct is to go to the bottom of the steps and look up to see if the door is still closed, it is. I search the entire basement, nothing.
I go up the stairs and open the door which leads to their kitchen. My brother and his wife are busy preparing deserts and with my foot still in the door I ask if his niece was downstairs? Paying me only half a mind he tells me they all left and went home. So I go back down to do a 2nd search, nothing.
So I tell him what happened and he's trying to tell me I was hearing noise from all the people upstairs lol. It is a quiet basement! I said dude the bangs were on the door directly in front of me at the tip of my nose!! He shrugged me off.
Yeah that was very strange!! That's my only paranormal story. I'm dying to see a UFO one day but never have yet!