At first, it looks horrible to see this cat with one leg missing. But then while observing it walk and roam around, it looks like his missing leg doesn't really bother him at all. He's basically the same with other cats.
It didn't make me feel that he's somehow different from other cats.
Eventually, I felt inspired by his determination despite his situation.
Apparently, he's not alone. He has an owner and it's evident on his collar with a bell.
I usually see him along the sidewalk while he's observing his surroundings.