Its more dangerous when near multiple tracks and the one you hear is the one you can see. Then another one comes along. Sounds like that may have been what happened. Terrible ending.
your exactly right. That's pretty much what happened....a friend of mine was there and said it was a stunt gone wrong. Again my info is second hand from a telephone call.
Greg was attempting to, from what I understand, out run the train for some of his you tube promotional/inspirational videos. Since there were multiple tracks, a train came unexpectedly. Like you said, the horn was sounding and everyone there, including Greg, got the trains mixed up. Greg tried to get out of the way, but from what I understand it hit his leg spinning him around back into the train.