Whats does he discover when he looks back?

When he looks back, he sees a bear.

Soon, as before, his stomach was full, but now he had some sense and he did not gorge or cram more down. Instead he picked
more and put them in his windbreaker, feeling the morning sun on his back and thinking he was rich, rich with food now, just rich, and he heard a noise to his rear, a slight noise, and he turned and saw the bear.