Olympics 2012 track cycling

Nope. I didn't know that.

Most of the videos focused on those lines religiously and the commentary made out that this was the end of the changeover gap... so the point at which the changeover had to have occurred by.

Hence my understanding, but I stand corrected.

The cameras for Pendleton and Varnish where focussed on the actual finish line on the track for some reason, while for the Chinese pair they were focused on the pursuiters line. Bit of a balls up on the commentary as none were relevant to the actual incidents, hence all the subsequent confusion.