I'm playing through Episode 2 again, and playing the part where you have to fend off the ant lions from the tunnels.. It's just so cool. But when all of the tunnels end up with three red light... That part is just so awesome it's untrue. Having all of those Vortigons (no idea how you spell that) owning all of them ant lions is made out of pure awesome.
There are so many in COD4 that I won't mention them all. Some of the missions where so good, that I feel like mentioning the whole mission as an 'awesome sequence'.
But an honourable mention goes to the part where you snipe Zachiev, and escape. Another part I'd mention would be the part where you go down to rescue the female pilot, when it happens, the process of rescuing her and the escape... The whole sequence was just so cool. And of course, the end sequence. The whole part from escaping the silos to when you get picked up in the chopper. The whole game was an awesome action sequence tbh...
So come on, what sequences have you completed thinking "Wow.... What have I just played?"
There are so many in COD4 that I won't mention them all. Some of the missions where so good, that I feel like mentioning the whole mission as an 'awesome sequence'.

So come on, what sequences have you completed thinking "Wow.... What have I just played?"