A flawless 60 point cycle by 67, 469 and 4362 is documented in 10 pictures starting with this one:
http://www.flickr.com/photos/daniele...57641848625215
According to the exif info on the pictures, the 60 point cycle took about 19 seconds (we don't see the ball being inbounded, so I'm estimating it took 3 seconds).
I think this might have been how the GDC saw the game being played.