We're going a little leftfield here. And showing my age.
This is one of the classic 16 bit demos - technically some of the graphics aren't that impressive but what did blow peoples' minds was the music and the fact that it was nearly 30 minutes long and only required 2 disks (although, you also needed two disk drives unlike many of the 2 disk reset demos that put clever code in the reset vectors).
Also there was the music - a storming bit of 90s rave by Echo (now known as SpoonWizard) that was one continuous 30 minute mix kicked off by the instantly recognisable Tubular Bells sample.
Personally I also like the muppet bit at minute 13 but that's just me ...
Originally posted on deflatermouse.vox.com