Oh now I remember where I saw one. When I was still doing production work, I did a demo for a local shop.
Unfortunately I never got past the demo, and it's in a very large format, but if you have time to kill and must see a Scion on the dyno:
http://www.merfproductions.com/vids/dynoday.wmv to stream the video...
OR
http://www.merfproductions.com/2.html and right-click and save-as on the Brauning Motorsports link at the bottom.
45MB or so.