I enjoy closing my recitals by inviting a member of the audience to join me on stage and give me a short theme on which to create an improvisation.  The audience seems to enjoy this moment in the performance and it allows me to connect with them in a special way.  It is usually the highlight of the evening for me.  Sometimes I am given a compact disc recording of the performance by the hall manager, which allows me to keep the improvisation as a momento of the evening.  

I put a few of these improvisations on my album Stations of the Cross.  Here is one.  I hope you enjoy.