By Emilio Martin (alvaro@interplanet.es)
The possiblity of entering and exiting lasts while the movie is being projected, though time inside it passes as real time, with no meltings in black nor "10 years after" label. If someone gets trapped in the movie, she will have to wait until it is projected again (only theatrical exhibitions work), or a sequel is released. Meanwhile she will live inside the movie's domain. But she will be able to exit only after spending the time the sequel takes place after the previous story (i.e., between "Alien" and "Aliens" have passed 57 years, although in the real world only passed 7 years, though luck).
At ST's discretion, a movie object or character taken out may or may not remain after projection is finished. Do what is more interesting for the story (and don't allow PCs to steal a Hunter Killer from The Terminator!).