At the end of the mission, "Prisoner 47," Price says to McTavish, "Whatever you're gonna do, Soap, do it fast!" PFC Vasquez says the same thing to Ripley in "Aliens" when they're trying to figure out a way to escape a horde of xenomorphs. Also, during the mission "Endgame", Price barks out "Soap, we are leaving!" in a similar manner to Hicks when they were ambushed by the Xenomorphs.
When using the Winchester 1887 with the "Akimbo" attachment, your character cocks the gun by spinning it in his hand, just like Arnold did while riding the bike in T2