There's a unique optional interaction involving a truck driver. At one point in the game, you'll encounter a truck that you can enter. If you manage to get inside the truck without being detected, the driver will offer you a ride to a different part of Outer Heaven. This can sometimes bypass heavily guarded areas or provide a shortcut to a new section of the map.
The challenge lies in getting into the truck undetected. Guards often patrol the area around the truck, and if you're spotted, the driver will refuse to help. This is a pure stealth challenge. If successful, the driver will ask you where you want to go, offering a choice of destinations. This can be a strategic way to reposition yourself or access areas you might have missed. Experiment with this option to see how it can benefit your current mission objective.