I stepped in to deliver four lectures this semester in a course that I have never taught before. I was quite daunted by the prospects because I had very little time to prepare the lecture material (our head of department made a last minute request for someone to step in because the department had stalled in the interview process for new academics who were suppose to teach in that course). Today I delivered the first of the lectures. It ended with spontaneous applause from the students. I guess it went well.