Location: This mission becomes available some time after the completion of the optional Risk Assessment mission. This time, you need to meet up with Dom at the airport in the Southern part of Los Santos (the above screenshot).
Hop onto the ATV (Nagasaki Blazer) and start following Dom by entering the airport (do not worry, you will not cause a police pursuit). Turn right, watch out for the taxiing plane. You need to ride up the ramp into the plane's cargo compartment, and wait for it to reach another location of an insane activity, with Franklin and Dom on the board.
Ride out of the plane and do not release the ATV straight away, because performing, at least, eight full rolls is required to complete this mission in 100%.
After you have performed the required amount of rolls, release the ATV and go into the regular freefall. Open the parachute and fold it right above the landing zone . Try to slam against the water surface (the above screenshot). If you have folded it on a low altitude, Franklin will not die, and you will have completed another activity required to complete the mission in 100%. You can now swim up to the landing zone (the yellow circle) and wait for Dom.
Rewards for the completion of the mission: none
Requirements for the completion of the mission in 100%:
- Dive Bomber - you need to slam against the water surface after you have jumped out of the plane. Ignore the landing zone altogether and fold the parachute at the last moment.
- Sky Blazer - you need to perform, at least, eight rolls in the air, while using the ATV.