In Windows, moving the mouse about can actually prevent certain processes from hanging.
eg.
eg.
It was just glorious. They were confused. "Look, this print should be triggered all the time and spam like hell, but nothing is happening! Where could it hang!" they wondered. And you just sauntered over, looked at the program, pondered for a second... and poked the mouse to one side. 5 more lines appeared. Eyes flashed bright with confused understanding.