It was a reply to his condescending nature.
I didn't have any fancy, smancy space age polymers invented by NASA, the shoes weren't designed to meet the rigors of a 400lb humanoid by a fleet of biomedical engineers to withstand the shock of professional athletes getting paid millions of dollars by a multi billion dollar company to perform at the highest levels of human athleticism.
I was only wearing $5 shoes, might not even have been less, made of canvas and rubber on pavement, climb a couple of trees, wade in a couple rivers, creeks and such, protect me from the sticker patch down the street and they were probably pretty worn on the bottom.
I didn't have a team of trainers, doctors or physiologists to pick the right tread pattern for the surface I would be playing on, or ensure it had the right support for my activity or body type. All I had was my Mom, who told me to try them on and just asked me if they pinched. Even without the latest and greatest technology and medical consultants, I never managed to break a toe, even when I got my foot stuck in the spokes of a bike.