Frustrating when things are beyond are control. Best to make best with what we have. Think many of us have experienced power outages at various times in our lives. May be best to just step back and find something else to enjoy. Maybe writing down what we wanted to accomplish along with what we may accomplish another time. This may help us work through the frustration better.

Good to hear you still managed to catch about half of the class time at the end of it all. Best with pursuing that further!