This is what I love: Screamers!

Two women sit on a rooftop ledge, one leaning against the other who holds a walkie-talkie to her ear. The scene is set against a backdrop of hills and a partly cloudy sky at sunset. The woman holding the walkie-talkie has a focused expression, while the other looks on. Both are dressed casually in jackets and jeans. A large cylindrical tank sits on the roof to the right.