When Reese Witherspoon is jailed and in solitary confinement, there is a scene where she is making a knife with a toothbrush and cellophane. Suddenly, she pulls out a lighter and begins melting the cellophane onto the toothbrush. How did she get the lighter in jail? She only smokes one cigarette at the very end of the movie, so why would she even have a lighter in the first place?