Quote Originally Posted by slinkedog
...On a ride I did with CindySue and SadieKate, I had an issue where my chain got stuck under something down there and a really strong guy had to literally yank it out 'cause it wasn't budging for me. I don't recall being cross-chained at that point, but I suppose it's possible.

Anyhoo, what you describe sounds very scary. Having to clip out at a moment's notice is one of my least favorite things about cycling.

What you described is a classic chain suck. It won't generally happen on a road bike but does occur on full suspension mountain bikes especially those with weird rear chainstay designs. The chain gets loose and slappy and gets wedged up where it doesn't belong. I've gotten them so bad I've had to take the chain off (thank goodness for a Conex link) or pull the chain ring off. My Gary Fisher Sugar 3+ had a weird rear chainstay design and is notorious for this problem especially if I cross-chained. Thus the reason for the invention of the third eye chain watcher! Someone would not have invented it if there was no need!