I heard this from my cousin while he still in NS. He told me during the first few nights of his NS, there is always someone pushing him down the bed while he sleeping. And the next morning his ear got blood flowing out.

Then got this particular night, while he was sleeping soundly, suddenly he hear boots marching sound. He slowly open his eyes a bit and saw a japanese soldier holding a rifle with a knife at the front marching around the room. he quickly act blur and go sleep.

As his case is getting more serious, my aunt brought him to a medium. Then the medium said that actually there is a "person" that sleep on his current bed. So that person is angry whenever my cousin sleep on it. As the bed are tagged with numbers and my cousin is No.7 which is considered an unlucky number. The medium advised him to turn the number plate upside down.

After that everything is back to normal.