I'm pretty sure I used to hallucinate when I was a kid.

I remember getting out of bed one night (not sure if it was a dream, but it seemed real to me) to go to the toilet (i was busting) and as I walked forward, I bumped into what felt like an invisible wall. I went to bed, scared and it was gone in the morning.

The second time I remember is when I was walking down my hallway during the day and I saw a crow (or multiple crows, can't quite pin point exactly) flying over me and then disappear in front of me.

I've also used to hear voices outside my bedroom whenever I was going to sleep at night.

I've also seen a snake go through a wall (when I was about 12) and a cats paw sticking through a door whilst I was in the bathroom. I ALWAYS saw something in the corner of my eye, which I know is common, but it happened quite often and it still happens to me today, I'll over somewhere and I'll swear I saw something like a person or animal etc...