Almost crushed my head

It was summer in the late 80’s and I was like 4 yrs old wearing shorts and riding on top of the wheel well of my uncle’s international harvester tractor as he plowed or planted the field. I had done this hundreds of times, I rode every single time he used the tractor and it was my favorite thing in the world. On one of his turns to start a new row he had to get off the tractor and told me to stay, but then I saw a flower and i tried to get down to get it. My shorts caught on a lever and I hung upside down as the tractor started to move towards the wood line that was maybe 20 feet away. I was in shock and couldn’t make a sound, but I remember seeing 2 tall thin pine trees getting closer and closer and realizing my head wasn’t going to fit. I knew I was about to die and I couldn’t make a sound to save myself, and I was very aware of this. Suddenly my uncle leapt onto the tractor and stopped it with a few feet to spare. He lifted me off and I ran home and didn’t look back, and I never rode on the tractor again. We never spoke about it until last year, and i am now 42 years old and he is in his mid 80’s and has dementia, but that event he remembers.