Grand Theft Auto: San Andreas/Monster

After the cutscenes, get into the monster truck. Now you must complete a timed checkpoint race in six and a half minutes, which begins as soon as you pass through the first checkpoint. Instead of a handbrake, this vehicle has four-wheel steering. So use the same button you would to brake to make extra sharp turns.

Rewards
Cash rewards are based on your time of completion.
 * 4:20 = $5,000
 * 5:00 = $4,000
 * 5:30 = $3,000
 * 6:00 = $2,000
 * 6:30 = $1,000

Tips
Use the dirt road to the left of the truck as you face forward to gain some speed before you hit the first beacon. This should give a few seconds.