Are you using flight trajectories with simulated drag and lift from Magnus effect?
But early on when I started this, I prompted the LLMs strongly to focus on having accurate real world physics baked in.
For "Back Spin" I used: angle = open 50°, Brush = -20° down, Speed = 13 km/h and I got a success "Lands - Smash Food". Do you have a table of the possible classification?