MTV has posted
a list of their top gaming moments of 2007, a list I like a bit better than the standard "Top Games of the Year" list because there were some great gaming moments in some crummy games that get passed over. I can't disagree with anything on the list and Mr. Totilo did a good job of describing the moment without spoiling the game.
If I had to add any it would be the bathysphere sequence that opened Bioshock
as it gave you a good sense of the tone and style of the game. I might add the car sequence from Uncharted: Drake's Fortune
but I think that's just a personal choice to give Drake some love.