okay so you know where the metal detecters are? well once u r in that room to the little gate thing that you can't go out of

then turn on your lag switch and start jumping at that gate

after about 5-10 seconds you should be in a far distance from terminal where you are on a runway lane with no planes around but you can still see the terminal map in the distance

the unfortunete part is that you are limited to where you can go it's as if you are in an invisible box but you can move a little