system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does rain fall in droplets and not like a huge waterfall?
gpt
When a drop of water forms in a cloud, it is a perfect sphere, and is so small that it falls very slowly. If conditions are right, it will run into other small drops, forming a larger raindrop that falls faster. If the drop gets too big, it will fall too fast, and will start to flatten out - instead of rushing around it, the air pushes on the front (or, bottom) or the rain drop. This keeps happening until the air pushes right through the drop, forming a shape like a very thin donut, before fracturing into many tiny raindrops again.

So there is a maximum size that a raindrop can grow too. Even if you drop a huge amount of water - like a waterfall - the same things happen to break up that large flow into small drops, given enough height.