http://www.singletracks.com/blog/mtb-repair/video-how-to-fix-your-gears-on-the-trailside-what-to-do-if-your-gears-are-jumping/
Srichrich442
flipped into Mountain Biking For Beginners
“Video: How To Fix Your Gears On The Trailside – What To Do If Your Gears Are Jumping”