The use of clips was very sophisticated
I don't think most people have ever given much thought to how extremely complicated it would be to put together a show this way. Each clip has to be relevant to the main character's mental state, and also be funny in the context of the script. It's almost unimaginable how much time they must have had to spend poring over old shows and cataloguing dialogue and so on. I'm sure computers helped, but at that time it would not have been as sophisticated as now.
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See a list of my favourite films here: http://www.flickchart.com/slackerinc