If there’s one thing we know, it’s that Mark has the ability to take a blow and recover…  maybe not immediately, but eventually… remember that this is the man that doesn’t shave and doesn’t age…

So with a THUD and an UNNNGH, We see Mark go down… it was destined to be.  Anything to manufacture a bit of drama… I like the plot suggested by the comments, where they make it to the surface only to be met by Jose and Jefe, but then rather than being killed, they are taken into bondage to serve in their human trafficking enterprise…  Carina is given some kind of harem outfit to wear- like Princess Leia in Return of the Jedi, at the, um, foot?  tail? of Jabba the Hut…and kept in their lair as a sex-slave…  all the while she spouts on about cave formations and other such nonsense…