(Video) Working on Chin Muscle Group and Expanding Larger Interval Motion

I didn't have a mirror behind the camera. Good though that it's primarily focused on just my chin, as that's what I was working on. A bit embarrassed though, as it's not really a physical attribute I want to show off. Self-conscious. :-S

Part 1

Part 2

Part 3

Part 4

I recorded these videos while away from home.