The Simpsons: Hit & Run Glitches

Plant workers on the street
1. Unlock very fast cars and jumping on L3
2. Go to the Power Plant
3. Drive through until you get to the slope which leads up to the exit with the Yokels.
4. Go to the bottom of the slope and back a bit until you hit the wall.
5. Go up the ramp at full speed and jump when you get to the top.

Yo will jump through the plant and if you land past the first invincible, big tree the Power Plant workers will have replaced the Yokels.