H2C_02.gif, 1.2MiB, 600x329
Quoted By:
Most niche being Roller Coasters. Other than that, I'm fascinated by Airplanes (and Aerodynamics and Aircraft Structures), I also am fixated on Calculus, Physics (mainly mechanics and rigid body dynamics). However, I don't know if these would be considered autistic (except for roller coasters).