Say is a Turkish pianist and composer whom I am coming to admire rather a lot - here he is in the Beethoven 3rd Piano Concerto doing his own cadenza. (That's the one or more unaccompanied extended solos in a concerto which are sometimes improvised, sometimes provided by the composer or sometimes composed by some other composer.) He is someone I find so very exciting...
And here he is doing one of his little jazzy party-pieces:
And here he is doing one of his little jazzy party-pieces: