Air awareness for me is developed through lots of trampoline variations. At the low levels this is often done without full salto's but instead with 1/4, 1/2 and 3/4 rotations using lots of back drops, front drops, seat drops and hand & knee bounces. I also include a lot of turning/twisting in these variations too. Anecdotally the gyms that I know have strong trampoline programs are the ones with very little issues with mental blocks.