Thanks, Suzanne. (Wanders off to order the book.)
I feel bad about it, but I laughed out loud at the idea of a chain-meets-Cairo-style-jumpy-thing disaster. Sorry.What I'm imagining is bending your leg (e.g. for a level change, or a passe type turn, or one of those modern Cairo style jumpy things), the chain hanging down loosely, and then getting a foot caught in it.