Yes I'm clumsy, but I cope with it and hide it well. I do my best to keep anything I might knock over, trip over, or tread on out of my way. I avoid dancing. I try hard to avoid making sudden movements, and to live my life in a slow, deliberate kind of way. I try to live according to a routine so that through repetition I learn well the "choreography" of the things I do. As a result, I manage to do most things with a surprising amount of efficiency, elegance and grace, and it can be very hard to believe I'm clumsy at all, as long as I'm not denied the aforementioned careful control of my behaviour and environment.
I've read that clumsiness is a common trait in Aspies because the motor neurones or whatever they're called don't fire properly, so physical movements tend to be jerky and rather out of control, and I'm sure hyperfocus comes into it too - if your attention is glued to one thing you're not going to notice much else.