I’ve been looking for it all over. Past few days, in the “pinch-off” behavior in bubbles.
This is a party balloon.
The top is A
The bottom is A, B. They’re basically distinct at that point (you can cut and seal) and as an analogy it works for other pinch offs like water drops.
IN the middle, there’s a twist. It’s not simple “A” anymore but it’s not quite A and B.
It’s A middle B. And what happens in the middle is interesting.
weird little wrinkly thing going on at f – and that’s where it quickly speeds up and very neatly becomes g quickly, after fighting at d and e.