what’s the hardest lecture you have ever had to do?

Question: what's the hardest lecture you have ever had to do?
- Keywords:
  class,
  difficult,
  hard,
  lecture
Asked by chipmunk to Luna on 17 Mar 2011 in Categories: About.
- Luna Munoz answered on 17 Mar 2011:
  
  The hardest lecture was only hard because I had students from all over the world. It was in Sweden, at the international university where I worked. There were students visiting from Greece, Spain, US, and of course a lot of Swedes. It was hard to make my ideas clear to all of them at once. But it was a learning experience for me and I’ll never forget it.

Question: what's the hardest lecture you have ever had to do?