His concerts are a mélange of songs by American and Czech composers such as his beloved Bing Crosby, or Jaroslav Ježek, the nearly blind , partially deaf son of a Žižkov shoemaker also known as the Czech Gershwin. His songs, such as Life is just a Coincidence (Život je jen náhoda) are still whistled on the street today – 80 years after they were written. Often, he poked fun at the powers that were. His David and Goliath, from 1937, for example, tells of how the Hebrew David easily overcame the bullying Philistine Goliath is a direct reference to Hitler’s anti-Jewish rampage.