I grew up in a farm town.  Graduated with a class of 29 people.

I'm 6'3" and I had a 52" jumping vertical (as in, I could jump up and touch my chin to a basketball rim).

I played basketball and started dunking when I was fully grown at 13 years old.

Announcer at a game couldn't remember my name and just called me "Slam".  It stuck.

Everyone in that town still calls me that.  I kind of hate it.