I know I was only supposed to list 7 things, but here are some more:
I "discovered" algebra when I was in 5th grade.
I was doing some kind of math problem, and instead of doing it the way the teacher told me to (too slow and completely inefficient), I used variables for solving the problems. But instead of x, I used a simple question mark.
To this day I've excelled at more abstract, complex stuff and struggled with rudimentary basics. For instance, I did better in trigonometry than algebra or geometry, and better at calculus than at trig. Not sure why.
I was in the gifted program.
Between 5th and 8th grade, I was part of the gifted program at school. Keep in mind that this was a relatively conservative, partly rural district on the outskirts of Richmond, Virginia. If I was so smart even these provincial White people had to recognize it, I often wonder if the true extent of my abilities has been hidden or at least downplayed by myself and the world around me (including the educational system). Probably has, and it's a struggle not to be bitter about it when considering my lack of worldly success.