Namko was posting that video specifically for me. I was honestly curious as to whether it was even possible to do that, let alone do it consistently. He was kind enough to take a video, and one of the only people kind enough to do the instant cast spell interrupted test.

On a different note, just for funsies I googled "get hit by aoe when I'm out (game)", and then replaced game with various titles. Star Wars, Tera, WoW, Final Fantasy, ect... guess which one was the only one to net search results of people actually having that problem? But yeah, totally not SE's fault or anything (sarcasm).

The only time I can remember running into anything remotely similar was when my computer was utter crap (I was on the verge of upgrading), and I was raiding Ulduar. Razorscale (I think? Blue Fire dragon boss) would net me about 2 FPS, and I'd die because I literally couldn't see anything. That was a looooong time ago.