All three Repsol Honda riders - Casey Stoner, Andrea Dovizioso and Hiroshi Aoyama - have suffered big crashes in the opening minutes of Friday morning practice at Assen.
Stoner and then Dovizioso suffered highsides in separate incidents at the left-hand Turn 9, leaving Dovizioso - who was lucky not to be hit by the following Marco Simoncelli – needing assistance from marshals.
Moments later Aoyama, standing in for the injured Dani Pedrosa, also had to be helped from the track after a fast accident towards the end of the lap - that sent his factory RC212V cartwheeling through the gravel.
Suspicion immediately fell on oil that forced the cancellation of yesterday's second practice session, but no other riders have fallen and Stoner is believed to feel that a cold tyre was the cause of his fall.
Dovizioso, who unlike Stoner and Aoyama was unable to walk away, has been taken to the Medical Centre.
UPDATE: Dovizioso has suffered a left toe injury, but is back in the Repsol pits and preparing to return to the track.
This morning's (dry) session has been extended to 90-minutes due to the loss of FP2.