This comment is for like three people on HN, but anybody remember when Paul Neave had a website/blog/showcase (c.2007-2010ish?) where the borders of the page had similar jelly effect? That was achieved with Flash back in the day.

Neave was a personal hero of mine back then... hope you're well if you're reading this!

Haha, yep, first thing I thought of as well. I still have a offline copy of that exact site saved somewhere.

I used to "get high" as a kid on the spiral illusion thing he built :)