Marquirrel is her nickname because of her nut gobbling skills. Her tree climbing skills are not good due to the fact that she's lived her whole life in Mack City which has 8 trees after the mass exodus of people taking the trees with them when they moved to the surrounding farmland in the 60's and 70's to live closer to the new super malls that were being built.
What we're seeing here is how hard it is for a nigger, who is used to ugly nigger bitches and white crackwhores, to last any time at all when he finally gets his paws on a decent-looking white slut. I'm actually surprised he lasted as long as he did, given his doubtless elevated excitement at being able to tap this trophy of a cute white whore.