Please see 'You Never Can Tell' for more details.
For my end-of-module assignment on my Open University T156 course, I had to make two films: one the film 'proper' and a second - this one - to explain the why and how of making the first. If you see what I mean. The combined duration of both films was not to exceed 5 minutes.
I must thank my daughter for taking the behind-the-scenes footage. First time she's been with me on a location shoot.