White Russian cocktail recipe poured with real fluid physics

Opus 5.5 is cracked at making animation. I gave it a hand-drawn reference image and this prompt: "Render a recipe motion graphic animation using JavaScript or HTML (whatever you think will produce the best result) to show the full recipe for a White Russian from start to finish, empty glass to completed cocktail. Explainer video style, showing the ingredients and measurements as they go into the glass. It should be a 30s video." About 25 minutes later I had a finished 1080p MP4. One prompt, no follow-ups. It built the whole thing as a single HTML file, using SVG and plain JavaScript with no animation library. Every frame is drawn from a timestamp, so it stepped a headless browser through all 900 frames and piped them straight into ffmpeg. It got the physics right as well. The ice floats once the liquid reaches it, the coffee liqueur sinks and darkens the drink from the bottom, and the cream sits on top. I didn't tell it any of that. Then it rendered test frames, found 3 problems and fixed them before exporting. Nobody asked it to check its own work. This used to be a job for a motion designer and After Effects. Now it's one prompt. What would you get it to animate next?