I don't know if I can say this is the exact moment my life took a dramatic left turn, but it's definitely a serious contender.
My family went to go see the Black Cauldron movie when it came out the summer of 1985. My twin, John, and I were about to go to kindergarten that fall, and our other brother was nine months younger than us, so... yeah, in hindsight, we might've been a bit young too see it. Not to mention we hadn't actually read the books at that point.
While we were out, we didn't hear the odd whooshing noises coming from the forest near our home, though I'd notice the after effects in the coming months.
Also, it probably didn't help we were living in the town that would be fully rebranded as Sleepy Hollow a few years after we, uh, moved away.