Venturi-Effect Random Seed Generator

If you have a fishtank, you see it all the time. You either have a pump or a powerhead that sends bubbles through the water. A "powerhead" is basically a bubble jet, like what you might find in a hot tub. It's about the size of a baseball, and hangs over the edge of a fishtank.

The Venturi Effect is what allows a powerhead to blow bubbles underwater. Basically, a little airtube dangles in the way of the outgoing water jet, and the force of the water leaving the pump sort of "pulls in" the air from inside the tube, causing a pretty big jet of bubbles to shoot out. The rate/amount of bubbles is controlled by a little plastic cap that regulates how much air is allowed to enter the tube on the other end

Long story short, hooking up a high-resolution webcamera so that it looks head-on into the bubble yet creates an absolutely insane amount of natural entropy. I've heard of people using lava lights as a natural entopy source for random numbers (the flow of the wax in the bulb has entropy) but a bubble jet webcam strikes me as as being way, way better for this sort of task. It not only generates heavier entropy, but it makes S-prediction essentially impossible. It's plausible to assume that in the future, things like the fluid dynamics of a lava lamp could be successfully modeled in realtime. However, with this method, you have literally tens of thousands of bubbles of indeterminant size and volume flying toward the camera per second, and all of them are travelling at unusual and unpredictable trajectories -- The ability to accurately model a system like would be next to impossible, since we lack the on-the-spot ability to capture and suspend each individual bubble in the water and measure it's volume, position, and trajectory....and even if we managed to do this, we'd additionally have to have the ability to do this for tens of thousands of bubbles per second. And even if we managed to do all of this, some bubbles are directly absorbed in the water, making measurement and tracking impossible.