Cam Levins ran like a champion but had to settle for bronze in a blanket finish in Glasgow.
Rudisha changed things up and led the field through a pedestrian 52.71 first lap, but once a boxed-in Amos got free in the final 100, it was game over as he passed Rudisha with 30 meters to go and had time to celebrate over the final meters.
The dream final we all wanted is set for 2:50 pm ET Thursday. Take a break from work and watch this one as it's worth 1:45 of your time. The real drama in the semis involved a brazen foul by NCAA champ Brandon McBride of Canada.