King of the pedantics wrote:
Unique means "one of a kind", so no, the odds of anyone here doing something that no one else does, or has ever done, is nil.
By that definition, I am the only one out of 7,000,000,000+ sitting in this chair right now, so yeah.
If you don't like that interpretation, the odds are certainly small (and growing smaller by the minute), but infinitely more than "nil".
And, if you don't like THAT interpretation, then I posit that I am the only person in human history who has parallel squatted 585lbs, broken 4.8 in the 40 yard dash, and broken 3:25 in a marathon.
Still, I assume the OP meant "novel" or "rare", not necessarily "unique".