A GTAV mod created by JulioNIB brings in a slightly unusual but highly effective tool, Just Cause 2’s grappling hook.
The hook which fires from the standard weapon in game allows you to tether two objects together, pull enemies or NPC’s to you or pull you to the object or vehicle to zip around the map.
Using the grapple in combination with your parachute, you can para-sail around the map dropping in on the unexpected.
The next step for the mod is to mimic Just Cause where by a vehicle you grapple to can be hijacked once you have reached it. This should make hijacking aircraft a lot easier than going to the military base and risking it all against the ground forces.
You can install the mod by following these instructions.