The value of immersion - CoC At the Mountains of Madness

I have mentioned before that I am playing At the Mountains of Madness right now. This is the first time I have actually played CoC in one of Chaosiums big campaigns at home. Almost all my other experiences have been con games and one-shots. As everyone probably know, CoC is a game where mood is important. Our Keeper have managed to get us fairly involved by using a few steps which have been very effective, in their simpleness. First of all we start by moving to a different place in the room. We move the whole table, so we have a tangible clue that it's time to move our minds into a new place. Secondly we have had ambient sounds for the ship engines at sea, the storms at sea and the windswept plains of Antarctica. When we hit upon a storm at sea, with the noise of the engine and the wind loud in our ears it was impossible not to be there. I've read about this effect before, but now I have felt it. Effective and very simple.