Sit Down, Ride Away and Die.

I'm going through the tutorials and in the web mobile one I see this Death script that triggers when you hit a target. It makes me wonder what other animations I can call for my avatar. I know I've seen others implement this in various ways, I'm wondering where the documentation is.  I'd love to control the avatar to sit down and go for a ride. 

I'm seeing this line in the code of the tutorial

player.playAvatarGripPoseAnimationByName('Die');
but then going through the various documentation and tutorials, I can't find details about it. 
I noticed a 'Respawn' call works too.