Heli Jumps | Grand Theft Auto 4: The Ballad of Gay Tony
During a Heli Jump you must glide through a series of rings and then land as close as possible to the bull's eye of a target. Heli Jumps are very similar to Target Jumps, however for Heli Jumps the target you have to land on is not visible from the start.
The rings just seem to be there to guide you to where the target will be. Missing one or more rings does not appear to affect score; all that seems to matter is how close to the centre of the target you land.
This video is from our unofficial game guide. You can view the full guide here