I've seen many demos in my life, but have never seen the "background" and making of them. It seems like quite a social event, many people of course saw these people as no life "geeks". It must have been quite fun though, you know, a few beers, chilling out and suggesting ideas to each other. My friend and I used to make some comedy disks for the Amiga, he used to come over, when we were in our teens, we used to sample the sound and add pictures etc - it was fun.
I think this is what made the Amiga days that bit more special. These days, the "people" aspect seems to have been swapped for MSN/Facebook etc.