Colombian has to readjust his line as moto gets too close on hairpin bend
The Colombian rider had attacked on the third climb of the day, the Passo Gardena, bridging across to Andrey Amador who set tempo for his Movistar team-mate.
The two riders were climbing at considerable speed as they tried to distance the pink jersey of Tom Dumoulin, and almost collided with a race motorbike as they swung wide on the way out a hairpin bend.
Thankfully there was no repeat of the accident which saw a number of riders, including Geraint Thomas and Adam Yates, hit a motobike on stage nine of the race, with Quintana able to adjust his line to avoid a collision.
However the escape came to nought, as Dumoulin was able to judge his effort well, bridging across by the top of the climb.