Why does my tea periodically alternate its rotational speed after stirring? (Link?

When you stir your tea, it’s like setting up a little dance between the liquid and the spoon, and sometimes they switch places mid-dance!

Imagine your tea is a group of kids playing tag in a playground. When you stir the tea with your spoon, you're like the person who starts the game by shouting "Tag!" All the kids (the liquid) start running around, following the spoon's movement.

But once you stop stirring, not all the kids stop at the same time. Some are still moving fast, while others slow down, it’s like some kids keep running even after they're tagged!

This is why your tea sometimes rotates faster or slower after you stop stirring. It's like a game of tag with different speeds, some parts of the tea are still going strong, and others have already slowed down.

Your spoon isn’t just a tool; it’s like a little coach in this game. When you stir again, it gives new energy to the slower kids, making them speed up again, and suddenly the whole playground is dancing all over again!