The brain stores a memory of what the body does. I learned some juggling. It's is very repetitive. It's catching falling objects, drilled into memory. And now,

The brain stores a memory of what the body does. I learned some juggling. It's is very repetitive. It's catching falling objects, drilled into memory. And now, when there's an accidental falling object, often my hand just moves to the exact correct position to catch it.