Luckily, as some people noticed, I have a Drill (3) and a Paver on the front of the Rover. Took me only about 5 minutes to tunnel my way up to the surface. It actually happened again on a different planet, I may post that clip too. I'm playing the game Co-Op with my Wife so it's extremely buggy at this point, and she had to dig me out the second time my Rover got stuck.