that'd be cool for some of the group ride videos I've been watching

 

How does that work?

 

He's got something on his helmet that swivels with a rod with a GoPro camera attached to it, if you look you can see the shadow of it from time to time.

 

Thats cool, I don't see myself using it though. I found this on a google search.
http://www.killershot.com/killershot-swivel/

 

It's better than holding a stick. At least both hands are on the handlebars.

 

Very interesting angles. A little dizzying at times though.