I remember that XD.
The second person is Cabbage xyz, or Chris.
The third guy is just some douche on the enemy team.
EDIT:
Took some random pictures from Gears of War 2.
Ryan with a Boomshield, same match as me.

Something random

RAAM, hiding behind the side of a bench

RAAM charging with the Boltok

Hoffman blindfiring with a shotgun around the corner