What are some of the earliest dreams or nightmares you can remember?

Inspired by this question

I’ve always had vivid and memorable dreams. Some of them rather terrifying, looking back at how young I was.

In the other thread I told about the paper mouse.

Another one I had, I must have been three or four. I was swimming in a lake with my grandfather (odd for two reasons: One, I couldn’t swim yet, and two, Grandpa died when I was 18 months old.) We were having a grand old time, swimming deeper and deeper into the water, when we were set upon by piranhas! They were everywhere biting us both, and I swam away. I got to shore and Grandpa never came back up.

Another was when I was in second grade, so… six or seven. It started out pretty cool. I was walking down the street to the corner store, like I did all the time for my mom (it was three blocks away. Yes, I have horrible parents). All of a sudden, Main Street is on fire! Big brick buildings are burning, lamp posts are aflame, there is fire raining from the sky! It was smoke everywhere and I couldn’t breathe. Cars were crashing into each other and people were running all over the place. Then one black car screeched to a halt in front of me, and Elias Koteas (Casey Jones from the Ninja Turtles movie) opens the door and tells me to get in the car, he’s going to take me to the Turtle Lair to be safe. Then I woke up. ^_^

Both of those dreams still scare me to this day.

Does anyone else have uber-memorable childhood dreams and nightmares?