65dBnoise, 
What do you do when one wheel of your 6-wheel rover is perched on a sizeable rock?
Read the story here: https://mars.nasa.gov/msl/mission-updates/9487/sols-3957-3959-curiosity-the-cautious-rover/
And a newer report, including the upcoming “Coyote Flats”, an area in a light-toned band that the team hopes to reach after the next drive: https://mars.nasa.gov/msl/mission-updates/9488/sols-3960-3961-big-fan-of-rock-bands/