From looking at the video below multiple times from 4:55 to 5:25 it appears that Noureddine Morceli's right leg brushes up against ELG's and then on the next stride Morceli places his right foot more to the outside compared to what his regular stride pattern is. This is where elg's right foot hits Morceli's heal and takes ELG down to the ground.
What's your take on this?
http://www.youtube.com/watch?v=8cLaqU4lbMs&feature=related
Have any of you ever tripped another runner in a race purposely and got away with it?