I forget who mentioned it, but just to humor myself
I went and did it:
Typhoon/Hurricane still in effect, Hannah/Irish/Pac fall through the "floor" they were on in the hanger that leads to the next hanger/next-shootout that we're bypassing the script to get to the "glitched jet" for.
Turn the corner and...
Woah, no Typhoon/Hurricane!?
Shanghai's background (minus the popped-out terminal) with no Typhoon/Hurricane effect from Frostbite 3 added. Mostly turned off due to the hanger interior battle?
Technically, this is where the shootout and finding the collectible dogtag on the 747's wing is supposed to be. But because we glitched around the hanger, the script doesn't trigger and the AI can't follow.
I think this is a Stealth Jet in the multiplayer, but not sure. Never seen it.
No clipping issues. You can pretty much free fly, minus the Typhoon/Hurricane physics being applied as far as I'm aware.
Map's pretty much gone. No out of bounds shenanigans to do.
BONUS: Landed to the "right" of the hanger (where you come from in the glitch) and nearly slammed into a barrier, whew:
Glitched/unseen barrier can't prone under it. Mostly done because DICE didn't expect you to get here and I doubt you'd see it normally from the normal areas you go through.
</fin>
---
Interesting glitch but 1) no weapons to target practice on 2) it really isn't an "easter egg" I feel since it breaks script and I don't think DICE intended you to break script just to (VERY TRICKY you have to basically needle the throttle/accelerator) get a jet out of the hanger, get it around the 747(?)'s in the way and then take off (good practice for BF3 and Second Assaults ground take off though?) and then just fly around in hurricane/typhoon weather(? I think, I had some trouble flying now and then but I'm not sure if that's physics or glitches depending on where the jet is for the engine to load/unload the Typhoon/Hurricane effects) and/or land it. I didn't bail on the helicopter but collisions in the hanger will automatically kill you and rest you to the checkpoint before the glitch stairs.