A "practice" rig for students and a display of some advanced Ae character rigging techniques.
Download free rig to try yourself here (CC12 & CC14 versions available):
This rig was created with help and inspiration from
Daniel Gies’ amazing work and tutorials
everyonediesfilms.com
Duik tools v14
Thanks for additional coding help from
Joe Russ at Mografi
mografi.com
Dan Ebberts at the Creative Cow Forums
forums.creativecow.net/adobe_after_effects_expressions