I hope you all didn't misunderstand... but that was my exact point - all shoes provide some cushion/spring. I assume Chuck and JR were just funnin'
I haven't seen the shoes (Nike Shox) but I assume they are NOT similar to the old "Spring" shoes that included a set of two(or more?) springs for about 3 inches underneath the sole of the shoe and then a second sole that contacts the ground. Those would be hilarious and obviously illegal.
Wish I had a picture!
Found one on e-bay (of all places - $20) but how do I put that jpeg into this message?