Our reporter on site confirms the Ski Racing story. This has happened before on this course. The finish line falls away towards the timing building causing a swale that the skiers can dip under.

http://www.skiracing.com/news/news_display.php/2861/ALPINE

No idea if they have photofinish backup there.

Last time this happened the broadcast video was reviewed. Problem is that NTSC is only 33 frames a second and not very useful.

Our reporter indicates this happened for the 18th racer down the course.