View a previously watched scene and press 'Start' followed by 'Triangle' to skip the whole of the scene until you are back in Quest mode. If you pause the game you will be prompted as to whether you want to 'Resume' or 'Skip' the scene which enables you to have a saved game before a scene and get killed afterwards.

In-game reset
During game play hold L1 + L2 + R1 + R2 + Start + Select.

Moving quickly and silently
To move arond fast without making a sound tap R2 quickly.