I have an almost encyclopedic knowledge of fish from the atlantic basin, specifically in and around the south east US and Carribean.
It freaks people out sometimes when I just start reciting fish facts whenever the rare occasion this comes up.
It's from me living partially on a boat as a child and tearing through books about fish while dreaming of being a marine biologist until the cold hard reality of for-profit education hit me in my early adulthood.
What are your weird topics and skills?
Memorized and performed this completely nonsensical and structureless monologue from the play Waiting for Godot because they offered it as an alternative to writing an essay in high school. Was the only one to take up the challenge in my year, and the only one to ever make it through from memory alone. My memory was great to have while I was in school, not useful at all anymore.