The present research of improvisation is built on three research questions: How do experts experience improvisation? What essential aspects can be distinguished from lived experiences of the phenomenon? What learning opportunities can be found when encountering the unknown? Questions were raised as a means to come closer to understanding how one reacts in moments of decision-making, where time-constraints do not allow a thorough planning and reflection. Descriptions of lived experiences of improvisation were collected from experts who work within six different professional fields; rock music,...