September 11 is the obvious. I was in One WTC when AA11 slammed into it.
Before that, though, back in the late 80s, I got up around 3 a.m. to use the bathroom and I heard a sound just like in the movies when a plane has been shot down. Then a second of silence, then an explosion.
My husband, who had fallen asleep on the couch ran toward the balcony in our apartment yelling that it sounded like a plane crash. We could hear sirens but couldn't see anything.
It was up the hill behind us. A Learjet carrying an employee of M&M Mars and his pregnant wife had crashed during a short flight across NJ. Pilot, copilot, and the couple were killed. Heard later the biggest body part they recovered was a hand.
The plane crashed on a rocky wooded spot between our apartment complex and a house, the only possible place it could have hit without hitting a building and killing anyone else. That whining sound as the plane came down stayed with me a long time.
https://aviation-safety.net/database...?id=19880524-2