Twice in my life I had to deal with them.
The first time, I believe I made contact with a child. The reason I think it was a child is if you look at the door knobs in most houses, that entity was about that height. I was scared because I don't know what that "person" wanted or why they were there.
My father is an engineer and I am too, but totally different fields. Anyhow, we used to play darts just to pass the time. We had a nice dartboard and everything. My mind led me to make a homemade dart gun, just because. Long story short, it was about 2 or 3 in the morning and I felt a hand on my foot as I slept. That didn't bother me because my mother used to check up on me because I had asthma really bad. The hand got heavier. So, I said, "I'm OK mom." The hand stayed there. I sat up and asked her for water. I saw a person that looked like they were made of white smoke. As I focused, this little person looked at me and moved its hand from my foot. The person slowly backed up and entered into my closet. I was cold with fear. I put the covers over my head. I heard rumblings in my closet. I looked up and they were standing in the doorway of my closet. I pulled the blanket over my head again and listened. Nothing. I peeked out from the covers and this person was about halfway from the closet to my bead. I grabbed my dart gun from the nightstand and I fired of a dart. It went straight through him and he stood there. His mannerisms were strange after that. His body crouched like a person that was trying to sneaking up on me. I saw him and he saw me. So, I decided that I'm just going to fight him. So, I got my nerve up and jumped out of my bed ready to beat somebody like a country grass fire.
This entity turned bitch and ran back into my closet and I wanted to go in there with him. I went to the closet and I saw something that I still do not understand, even today. My grandmother was there with her finger to her lips, like when you shush someone. My anger quickly subsided when I saw granny. My granny and I had a close bond. Keeping in mind she had been dead about five years at this time. And then she disappeared.