John Harner leads his charges through a trumpet master class on the second day of the weeklong UMSL Jazz Camp, which is now part of the Jim Widner Big Band Jazz Camp series. The musicians added an extra level of improvisation that day, moving class up to the naturally illuminated J.C. Penney Building/Conference Center lobby due to a power outage that hit North Campus.
![Eye on UMSL: Improvisation](https://blogs.umsl.edu/news/files/2013/06/eye_improvisation_495_279.jpg)