Chalapud goes off on a solo venture, Arredondo attacks for mountain points and Pantano goes too. A handful of strung out riders go over Gavia in the lead and it all goes a bit mental on the descent with attacks, people taking tea breaks, and riders strung out everywhere (poor conditions leading to no time gaps makes it even harder for anyone to understand). In the end a lead group of 10 or so with Kiserlovski as the best placed GC rider settle in about 3 minutes up the road and all the other contenders settle back into one bigger group. Stelvio is controlled by Movistar and Tinkoff Saxo for the most part, though Rolland tries a brief pace injection. Cataldo attacks near the top as the break is faltering and getting reeled in and things string out again going onto the descent that is rumoured to be neutralised but nobody is racing it like it is.
Something like that