Johannes Chrysostomus Wolfgangus Theophilus Mozart was born in Salzburg, in what is now Austria, on this day in 1756. Although he lived only thirty-five years, he composed more music than one would think possible for a man who had lived a full three score and ten years. One of the most famous arias from one of his most popular operas is “Der Hölle Rache kocht in meinem Herzen” (“Hell’s vengeance boils in my heart”) from The Magic Flute. Very few people are able to sing it, and I would hazard a guess that very few would be able to whistle it, either, but there is at least one — professional whistler Geert Chatrou. Here is his jaw-dropping performance of this diabolically difficult aria. If Mozart were still with us, I think he would approve.