Great "yahoo run"~
Saw a guy by the name of shredr do something similar. Only one hanger though. The neat bit was that a fella by the name of escort took the screen shot from within the hanger in his own plane. So in one frame, you see two planes in the hanger, one inverted. The picture won a contest and was posted right on the WarBirds game page with the caption "Inversion Immersion"
Another yahoo run we practiced was inverted landing on the canopy in-tact. The winner was the one who made it alive into the hanger first. Crazy late nite dweebieness I guess, but a fun way to relax after a marathon of sorties.
WTG again, great moves through the hangers!