There's a few stores release videos around that show 'interesting' release dynamics. be careful, though - most of the ones that do the bizarre stuff are (empty) fuel tanks or (empty) rocket pods. If an actual bomb generated so much lift relative to its own weight that it could "fly" it'd be one Hell of an inaccurate dumb bomb (and yes, I know there are specifics of the upwash field, but still - you want your bomb to be a projectile, not a glider).