Stretching Animation Skecthup + LightUp + Keyframe Animation

Here is a quick test at using the plugin Keyframe Animation and the plugin LightUp with Google Skecthup.
This animation is done using the scale tool and I'm simply stretching the model the desired direction. Nothing too exciting, but this might have potential in animating stretching and moving muscles and skin. However I'm still getting a problem with jerkiness in the animation.
I hope this is somewhat something worth seeing; I'm just jumping into possibilities of using 3D animation in my works.