On lap 9 of the Austrian GP Zarco crossed the trajectory with Morbidelli causing a terrible collision. The bikes in the impact were semi-destructed, while Franco's was flying across the track, passing right in front of Valentino Rossi's, who was coming up at that moment.
For a split second, the Yamaha-Petronas literally didn't wipe out Vale's. That would have been a catastrophic impact.