BTW howcome when you kill enemies be they people, zombies, or monsters/aliens suddenly there is loot and weapons on their bodies, and yet no means of storage from where they came from unless they were shoved up their butts? :s
In a related manner, how characters in adventure games can carry so much! They can easily pull a ladder out of their pocket!
It's the same thing with RPGs, though at least with RPGs you have carry limits and bags that help explain how you can carry more stuff. They both have conditioned us to the hoarder life 
