That actually reminded me of a bug I submitted a while ago. It appears to be fixed now, but I was pretty surprised at the answer they provided at the time. When instant search first came out, anything that auto-completed to "do a barrel roll" would initiate the animation. It's such a popular term that simply typing "Do a" was enough to trigger it as it was the first result.

https://productforums.google.com/forum/#!topic/websearch/R5A...

Strangely "tilt" sets it back to normal but keeps the domain, then when you change the search query it flicks back to backwards mode.

tilt css probably overrides the mirror css

Zerg Rush is broken though; Zerglings attack the air, dealing damage to DOM elements on the other side of the screen.

Makes sense, it's an old animation, probably a gif or something. It even uses the old 'o'.

It's not an animation, you can kill Zerglings by clicking on them.