Yeah, not much in that at all. if it wasn't Wout, nobody would look twice at it.
Between that and the finish, you have to give huge credit to both Sagan and vanAert for their ability to control their bikes so well, at such high speeds, in such tight quarters. With the nudge WvA got at the finish, any average cyclist riding flat out like that would have slammed into Ewan and Bennett and brought dozens of guys down. In the event, he was able to ride the bump, right the ship, and cross safely.
Sagan went for the same gap Ackermann went through the other day, but the difference was that there was space on Gaviria's inside to get there, but not on vanAert's. It's a difference of centimeters, but once Sagan saw that the gap wasn't there, he needed to ease off, not barge.