Headless Master Chief
From Halopedia, the Halo wiki
The Headless Master Chief glitch can be done on the Halo: Combat Evolved level The Pillar of Autumn. This strange glitch can be performed at the very beginning.
- Wait until you step out of the Cryo-chamber.
- A split second after you come out, jump back inside the cryo tube.
- Then you should see the Headless Master Chief.
Sometimes 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.
Video Help
Another way is to jump crouch into the cryo-tube (See Video). Which you will not need to look at a certain angle, the only down side about this is that you are suck inside it and you will have to restart the level. Sometimes jumping inside the cryo-tube help and will fling you out and let you continue your game.
<youtube width="200" height="200">YiUTDAS6__g</youtube>