The problem arises when operating at night with night vision goggles instead of headlights, a nice edge against the other people. But there's no depth of field with NVGs or IR driver's periscopes, and a pothole could be 6 inches deep, or 10 feet- there's no way to judge depth, it just looks like a black oval.
So it can be real easy to get too close to the edge of banks along levies or riverbanks, especially if trying to keep the upper parts of ther vehicle in turret defilade, with as little of the upper half of the vegicle sticking up past banks or dunes to make a good target for a dug-in RPG shooter.