Unlock: Use Trevor, Complete Minor Turbulence
Requirements:
What Goes Around – Buzz Joe and Josef before wasting them.
No Migration – Neutralize Joe and Josef before they leave the farm.
Follow the marker. Either run Josef over or zap him with the stun gun. Equip a rapid-fire weapon, follow the next marker which leads to Joe and blast the tires of his tractor. Take care of him when gets out of the tractor.