Headless Master Chief

In the level The Pillar Of Autumn (Level), a strange glitch can be performed at the very beginning.

1.Wait until you step out of the Cryo Tube.

2. A split second after you come out, jump back inside the cryo tube.

You will be pushed out but if you look inside the tube from a certain angle, you will see a headless Master Chief. Also, if you jump on the cryo tube, you might fall into the small space behind the cryo tube.