just went down. and i think i actually got the words "oh, no" out as i was falling. >> friend and former teammate, elizabeth yetzer, can barely watch. >> the whole stadium just like, oh, my gosh! you know. and, of course, you're thinking, there's -- she's done. >> the rest of the pack bolts past heather, leaving her several yards behind, entering the final lap. but with the heart of a champion, heather gets up. >> it took a while for everybody to catch their breath and then go, oh, my lord, something very, very special is happening here. >> i knew that i needed to continue to run and just earn some points for the team. >> she starts to make her move. >> to me, they're all bodies and they're targets out there. i had my first target in sights and i started catching her, and after i had passed my first person, then i saw that the