This is illustration of Skin/Bone animation. The second sample has model rendered with wire frame material and added bone visualization.
You can reproduce this sample by yourself.
Before exporting file from Blender you'll need to install updated (fixed) COLLADA export scripts.
Detach camera (check 'Show Camera' box) and use controls:
Rotate: Left-Mouse-Drag, Pan: Ctrl+Left-Mouse-Drag,
Zoom In/Out: Shift+Left-Mouse-Drag, or Mouse-Wheel
Powered by Papervision3D rendering engine. Model is courtesy of Brad Roodt email@example.com