Actionscript 3 Goo Balls

Inspired by Tower of Goo, I wanted to see if I could make my own goo balls. However, the balls in Tower of Goo use scaled bitmaps to look gooey, and I wanted to go a little beyond that, to make the goo really feel "juicy" and dynamic -- stretchy and squishy. Mainly, I wanted to give the impression that mass was conserved as two balls were stretched away from each other. Here's the result... just roll your mouse over to see the effect. Let me know what you think!