Classic/relevant fandom videos, go!

Heya! A while ago I tried going on a nostalgic trip down memory lane, but my memory kind of sucks... Bad. So I thought I'd drop by and ask:

What are some Homestuck fanvids (ancient or contemporary) that changed your brain chemistry forever?

Can be fansongs, memes, lyricstucks, cosplay panels, animations, voice overs, fandubs, fan comics, AMVs, an obscure version of Karkalicious... You name it!

(↓ here's what I have so far!)

https://youtube.com/playlist?list=PLVZhVZKA6VbVFSnauqsheRhCJ_Aglr2yO&feature=shared