When I was a kid, at my first house we had woods with a very steep hill behind it. You had to grab the small trees to keep from sliding when going down. Way down below was "Roaring Brook," and I could hear and barely see it, and was fascinated. This was even before age 10. My parents would warn me "It's dangerous down there." Wrong thing to say to a curious kid...Whooom! Off I went and explored. It was a magical thing back then.
Later, at my second house, we had miles of woods, and after school every day and on weekends, I was off on another adventure, playing mountain man or army or any combo of the above, making shelters, fire, all sorts of things.
I loved Tarzan, too, and scared the crap out of my parents one day, when, at age 10 or so, I was inspired by the Tarzan TV show, put on my trusty red, white, and blue speedo (this WAS the 70s), climbed a tree and tied a rope, then took the other end and climbed onto the second story roof of the house. My parents came home from grocery shopping, and my mom, carrying eggs, etc. looked up and screamed in terror for her life, dropping the bag and breaking the eggs, as this howling, skinny pale thing came swooping down from the roof towards her unexpectedly, heightening the scare with his best Tarzan call, "AH-oooh-aaah!" I had trouble controlling the swing and crashed into her, knocking her to the ground and causing her to fracture her wrist.
They grounded me for awhile and took away my trusted olympic speedos after that (not to mention hiding all ropes), and were more careful about what stunts I was possibly pulling in the woods after that...
Because I was a little budding daredevil, my mother was always saying, "OH, Brian!" She said it so much, the neighbor's kids thought it was my name.. (Mom, when is "O'Brian" coming over to play?")