Collar Collision In Autodesk Maya

Hey guys, recently I learned about collisions. It's a joint-based setup with MuscleKeepOut nodes. In this, I used nurb curves, some clusters, locators, joints, and tools from muscles.
Hat with ribbon set up and
finally facial expressions.

The models shown in the videos are some of those downloaded from various websites for my rigging practice; credit for the models goes to their respected owners.

thank you