Comment by iainmerrick

I was curious what the advertising board would have looked like to the athletes -- it must be a bit distracting to see a display scrolling at ~10m/s!

You can see it here at 9m50s:

https://youtu.be/7Xnr805bm4E?feature=shared&t=590

It's just a single animated strip, one pixel wide. I assume the camera array is on the opposite side.