Primer (movie)
Carruth has a college degree in mathematics and worked as an engineer.  While writing the dialogue, Carruth studied physics, so the conversations would sound real. He used the short phrases and jargon that scientists use when they are working. The time machine itself is a plain gray box. It has an electronic "hum" made with a mechanical grinder and a car engine. The movie was shot in industrial parks and little houses in the suburbs.