It is just part of being competitive in a circumstance where the world, for some reason, is collapsing around you. The crowd was on her; ND had lost their Mojo; they were already celebrating this huge road win, and in a second, everything had turned around. Hard for a person that young to keep their poise. She, likely, was also kicking herself for making the turnover, and felt the call was
unjustified ( or wished it were ). She is probably a great kid.