thanks i have been trying to do this myself but i gave up its good to see someone else figured it out
You can do the campaign in 15 mins After the intro when you are attacked in the bus with your golden path buddy =) Pagan brings you to the fortress to have dinner with De Pleur, mr pagan and golden path terrorist. Everyone leaves the room and pagan says he will be back. 15 mins or so later he returns and this is the easter egg. and at least this way you get to eat lol.