As I clearly said Miller put his hand on the small of Amirault's back in the way that runners often do to maintain spacing in a pack, that's all. The rest is your imagination.
He was showboating pure and simple, just acting like a jerk.
Amirault was running in front and didn't move off the curve until contact was made so it's hard to see how he could be at fault. Regarding your 'absurd' scenario, that would require a flagrant foul (NCAA Rule 5-5-1).