I can think of three dreams I had when I was around 4-5, but I'm not sure which came first.
1) A couple of friends and I sneak into a cave and see a cauldron over a fire. I decide to jump into the liquid in the cauldron. Practically as soon as I'm in the cauldron, knees-deep in this liquid, I can't move my legs and I can't feel them. A witch approaches -- either we see her or we just "know" she's coming, I can't remember -- we're all shouting and someone pulls me out of the cauldron, and we all run out of the cave.
2) I'm in my preschool and my parents are talking to the teachers about taking me out of school. I tell them not to, that I like it and I like my friends and I want to stay. They don't hear me. I shout my protests instead, and they still don't hear me. It's like I'm invisible.
3) I'm in the apartment where my parents and I live. I look into a mirror and the face looking back at me is wearing this evil grin. I move to the side, and it moves with me, but still with an evil grin. I duck down, but the mirror is a full-body mirror, so that doesn't work either. The evil mirror version of me either says something -- mocking, like "you can't get away" -- or smiles/laughs mockingly at me.