What's your favourite mission/section in a game from this generation?

Discussing this with a friend online, what mission/section would you say is your favourite from this generation of consoles?

All Ghillied Up from COD4, From Virmire onwards in ME1, the bank robbery mission in GTAIV, the driving section in the last mission of Halo 3 are ones that I've played that immediately spring to mind for me.