i'd have to say my favorite is after going back to use the water hose and obtain the oil for the gasoline. if you're the adventurous type and went back to use the crank and get the grenade rounds and perhaps go check on your old fat friend from the very beginning. anywho my favorite part is when you're running through the streets, and you hear a girl being chased by zombies of course. if you follow her she'll lead you all the way to the little narrow ally, right before the room with the fat guy locked in the cargo hold. (you never actually see the girls face or her identity) but i assume it's his daughter and i find it funny that they both died one room apart. and then you get the gun powder and his journal and it makes it all worth it!