As a documentary filmmaker, I'm very respectful, and my interview style is not intrusive. I don't really have an agenda. I just go in there, I mumble something or other, I wait for them to speak, and I wait for them to stop.
However, I wasn't very good at the sciences, or didn't have a lot of help in the sciences or something but certainly didn't set science for my A level. And when I came to take my A levels I didn't get a good enough result to go to University.