There’s no humor here, Ladies and Gentlemen… Gabe is dying to tell Mark that he blames him for the predicament they are in… after all, it was Mark that herded them into the cave in the first place…
This reminds me of the scene from “Oh Brother Where Art Thou?” where Pete declares, “Who elected YOU leader of this outfit?” To which U. Everett McGill responds, “I figured it should be the one who has the capacity for abstract thought…” Mark, I am pretty sure that excludes you…

So yes, Gabe. Mark has your back, leading from behind… you are expendable, after all…