If you played Just Cause, then you probably liked the special ability from the game: clinging to cars and helicopters, a very special car theft, clinging to a building with a hook. This script adds these abilities. Of course, the animations are far from perfect, but what did you want in GTA IV?
Jumping on car roofs.
Stealing cars you jumped on.
Automatically equips a parachute and deploys it when you fall (TBOGT only).
You can drag the peds towards you using the notorious cable.