On Sunday May 24th, Boom Chicago presents its show “21 Years of Mockey,” a mix of improvisations and scenes looking at the culture clash that happens when American comedians set down roots in Amsterdam. Boom Chicago is an Amsterdam-based creative group best known for its live comedy shows that appeal to internationally-minded Dutch people, the expat community, and visitors to the city. Incorporating high tech tools and live music, “21 Years of Mockery” is two hours of laughter and improvisation without a net.