This video is a perfect example of why you need flag marshals at every motocross track. And more importantly, ones that actually know what they are doing!

From what I've read online both of these riders walked away from this incident and raced later that day! The footage is from Glen Helen motocross track in California.

Anyone who's been landed on or landed on another rider will know what this feels like - it the "oh s*^t" moment:

http://www.youtube.com/watch?v=7OAYt8m6AAA