So witnessed this a few times as a medic and once doing an NPAS test. I think, if you fly over Los Santos Customs. It tps you into the building killing you.
https://gyazo.com/7e6bfa633a51a4ae7a562c3ebb690a12
https://gyazo.com/7e6bfa633a51a4ae7a562c3ebb690a12