It's possible to move around during the intro of Amnesia: The Bunker, which allows the player to grab a couple of items earlier than intended. This is particularly useful for No Major Glitches runs, as a fuel can can be obtained before the wakeup sequence is complete. Doing this allows the player to run over to the door and immediately perform the first trick, as the fuel can is already in the inventory.
A full write-up on how to will be written here, but in the meantime, please watch Sy's in-depth tutorial: https://youtu.be/BhnS_T4pKgg