Frozen Fireworks

I have been working on my basic L-System script (no fancy stuff like a rules interpreter) adding some gravity and randomness. The two on the right are generated from the same base parameters.

Earlier I worked on making these things dynamic, and posted the result on YouTube:

I animated the parameters driving the dynamics, and obviously setting them too high makes the whole shape come apart. So I need to use more points or push them around gently.