I re-watched Donnie Darko Recently and realized that the trampoline symbolizes a black hole. It is round and black like a black hole and the people jumping on the trampoline symbolize the chaos and distortion that surround a black hole. There are some that theorize that a black hol could be used as a wormhole for time travel and Donnie Darko is a Time Traveller movie with even our friend Steven Hawking's Book "A Brief History of Time" making an appearance in the film.
Another great Movie is Duncan' Jones' Moon It is about "Sam Bell" who "has a quintessentially personal encounter toward the end of his three-year stint on the Moon, where he, working alongside his computer, GERTY, sends back to Earth parcels of a resource that has helped diminish our planet's power problems."
Sam Bell's name is no accident and his initials S.B. are code for a Spiral Barred Galaxy. "Edwin Hubble classified these types of spiral galaxies as "SB" (spiral, barred) in his Hubble sequence, and arranged them into three sub-categories based on how open the arms of the spiral are." .....The current hypothesis is that the bar structure acts as a type of stellar nursery, fueling star birth at their centers. The bar is thought to act as a mechanism that channels gas inwards from the spiral arms through orbital resonance, in effect funneling the flow to create new stars.
We learn in the movie that the station on the moon is in fact a nursery of sorts (i'm trying not to give a spoiler here).