I have this hazy, memory from when I was about 8. I was exploring a peat bog, which was fun because everything was soft and squishy and I could just run around. I saw some weird looking bushes, and decided to go check them out. But, as I ran up, it turned out there were growing over this sort of wet hole, where maybe there was a spring or something. I suddenly fell about 8 feet, and was in this mud pit slowly sinking. Luckily, I managed to grab some of those bushes I'd seen, and pull myself out. But it was very hard, because the mud was pulling me down like quicksand. Eventually, I crawled back out on the bog, covered in mud.
Nobody I was with remembers this, and honestly it might not be real. Childhood experiences are super weird.