SO have watched this 6 times and still can't believe it. Thew way I read this situation is as such;
- Guy Overtakes (Could be he is getting overtaken on the inside (illegal) but this does not seem to be the case)
- Guy Blocks by slowing down immediately to grab something from his jersey pocket.
- Guys veers to the inside and body checks other ride
If you just dropped somebody on the asphalt would you not at least stop to check they are ok? I can only awesome in the heat of competition the person though somebody had just ridden into the back of them and it was completely their fault.
I would still hope I would stop in this circumstance at least to check if that rider was ok. Still in shock from having viewed this 10 times.