When overtaking a slower rider, always wait for them to pull over before passing.
http://www.dailymotion.com/relevance/search/Downhill/video/x2m62b_mondial-du-vtt-descente-de-venosc-c
http://www.dailymotion.com/relevance/search/Downhill/video/x2m62b_mondial-du-vtt-descente-de-venosc-c