Important scene in True Grit

In the movie True Grit 14-year old Mattie, played by Hailee Steinfeld, shows how serious and determined she is to find her father at 1:15. Mattie sees her “partner” Rooster, played by Jeff Bridges, across the river already starting on the expition into the Indian territory with another man. She herself wants to be the one to find her fathers murderer and have revenge on him though. Mattie asks to be taken across the river and when she is denied  and lead back to town she grabs and apple and throws it at the back of the mans head  and takes off with her horse towards the river as they leap into the water to swim across. Instead of just letting Rooster an old U.S. Marshel that she payed to help find her father shows how serious she is by refusing to go back home, threatening him that if she is to turn back at the moment she will acuse Rooster of theft for stealing ten dollars from her. As the other man spanks Mattie on the ground Rooster shows his true colors by pulling out his gun on the other man to have him back away. Mattie now gets to carry on the journey into the Indian territory to seek revenge on her fathers murderer.