One thing I often wonder is how do you write a location in a script? Say the script says they hang on a bridge. You'd have to have a real bridge and access to do it, right? Say in The Terminator Arnie arrives near the Griffin Observatory- was that written in the screenplay specifically or they must have thought about it before hitting the floor? Say like in T2 where he arrives in a random alleyway why didn't they do that in the first? Contacts, networking?