When the hair on your arm is in a state of permanent erection and your eyes become instantly wet, you know you're experiencing something extraordinary. In this case, it was the ménage à trois of some of the greatest piano artists of our time at the prestigious Rheingau Musik Festival: Chilly Gonzales, the fierce musical polymath, Igor Levit, the courageous classical interpreter, and the epitome of lyrical, Malakoff Kowalski.