It’s the edge of smooth dirt!!!
EDIT: I’VE REACHED THE EDGE OF THE EDGE
I tried going to the edge of highrise, but the game kills you before you can get to it.
Then commit suicide while you are using the jetpack so your body goes flying all over the place, and hopefully across the edge of the map. Unless there is an invisible wall blocking your way, it should work.
is this the real life?
is this just fantasy?