Volume changes of the lifting gas due to temperature changes or to changes of altitude are compensated for by pumping air into internal ballonets (air bags) to maintain the overpressure. Without sufficient overpressure, the blimp loses its ability to be steered and is slowed due to increased drag and distortion.
Maurice Jarre The publisher credits Barry Devorzon and Perry Botkin with composing Nadia's Theme. Maurice Jarre.
1,360 pages on this wiki. The  Gravity Falls Main Title Theme , composed by Brad Breeck, is the opening theme song played over the title sequence to Gravity Falls.It is often fan-dubbed as  You Made Me Realize , due to its strong similarities to the real You Made Me Realize song Breeck wrote for MTV's Awkward.ade Me Realize is commonly mistaken for the extended version of the Gravity Falls theme song. It is also stated on Breeck's website that the two songs are indeed different, and not related to each other. The official theme song is available on iTunes for $0.99.