Not a top three wishlist, but this scenario would be awesome.
Walmsley and Rupp bump into each other at one of the aid stations. Nothing huge, not really a foul just one of those things that happen. It's really no one's fault, but if you dissect the video frame by frame, it looks like Rupp is more to blame.
Neither runner is really impacted but Walmsley is unable to grab his fluids and decides to skip that station rather than stopping and going back to get it.
Rupp finishes third, Walmsley finishes about 30 seconds back in 4th.
Walmsley fan boys and Rupp haters unite in losing their collective sh!t and don't ever get over it.