Never say “It’s really easy,” because actually it never is. Never say “Oh you’ll soon get the hang of it,” because without knowing it you’ve probably been faffing around trying to do it yourself for the past five years without realising it. And never say “All you do is . . .” because that will just drive whoever you’re saying it to bonkers. So here’s a clip from YouTube which (I hope) I’ve copied and pasted successfully. Just testing, and it is my all-time favourite film reviewer. Not that I ever get round to watching any of the films.