Ratcliffe: Shoot! [As Thomas runs by, he trips and accidentally fires his gun, almost hitting Ratcliffe in between the legs.] Them, you idiot!
Pocahontas: It would've been better if we'd never met. None of this would have happened.
John Smith: Pocahontas, look at me. I would rather die tomorrow than live a hundred years without knowing you.
Answer: He probably knows that if he tries to escape he'll be shot down by the Powahatans' arrows. He prefers dying with some kind of dignity rather than while running.