http://www.trendpimp.com/media/817/800_HP_Loud_As_Stink_Toyota_MR2_Turbo.html

There was a mix-up in the website where I found this.  It was supposed
to link to a different video, but they screwed up and this one appeared.

It made my cat sit up like a gopher - I've never seen her do that
before.  She seemed to think the sound was coming from somewhere other
than the little PC speakers a foot or so away from her.  After sitting
up like a prairie dog or gopher for most of it, she ran out of the room.

I wonder if there was some high-frequency noise inaudible to humans that
set her off or if it was just the noise that we can hear.