One of the things that causing me both grief and joy these days is my latest parttime job: a teaching assistant position at the university. I am TA to three courses in the Economics department: Programming I (Java), Programming I (Visual C#), and Mathematical Programming.
The first two I can get by with, because I used to study programming in my junior college years, but the Mathematical Programming class? I am probably more clueless than the students. So I always dread being asked questions by the students because I have no idea how to answer them. I tried to weasel my way out by telling the teacher that I have no knowledge whatsoever in the subject, but instead he said that I can learn along with the students. No way out, then. Let the stress continue.
By the way, I forgot to mention that all these classes are conducted in Japanese. This was actually one of the most important reasons why I chose to take the job. I thought it would serve as a great experience and good practice also (oh, and it pays pretty well, too). Well, I'm getting both of that, but that doesn't stop the stress... lol