The pink jersey was back on his bike in little more than a minute, but was unable to catch back up with the leaders, eventually finishing more than two minutes down to just about hang on to the race lead.
While the debate about whether the other GC contenders should have waited for Dumoulin was heated, such an episode also saw a chance for a few light-hearted reactions on Twitter.
The controversy stemmed from this incident, which the cameraman thankfully turned away from before things got too personal.
"Physical problem" is one way of putting it.
The Team Sunweb mechanic seemed to forget that he wasn't pushing his rider off after any old mechanical.
From Sean Yates' perspective there was only one course of action.
There was also plenty of opportunities to mix condemnation of riders not waiting for Dumoulin with cheap jokes.
Others though it might be a clever tactical ploy which us amateurs could learn a bit from.
Of course it gave plenty of chances for the TV commentators to have a bit of fun.
And someone just had to bring up Ag2r-La Mondiale's brown shorts.
Meanwhile up front Vincenzo Nibali certainly wasn't hanging about on the descent.
And although he held on to the pink jersey by 31 seconds, Dumoulin didn't look too happy on the podium, even getting booed for not spraying his champagne.
Tomorrow's stage, 219km from Tirano to Canazei with some long, energy-sapping climbs, will doubtless see the GC contenders test Dumoulin's strength once more, and should make for an enthralling day's action.
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