The Moto2 race at Jerez has been red flagged on the second lap after Simone Corsi put a tight pass on Shoya Tomizawa for the lead at the end of the back straight.
Tomizawa, winner of the first ever Moto2 race at Qatar and on pole at Jerez, went down - with fuel from his bouncing bike then causing the following riders to fall like dominoes.
A 17 lap restart with original grid positions will now be held.
Pol Espargaro has won his home 125cc Spanish Grand Prix at Jerez, having been waved into the lead by countryman Nicolas Terol with four laps to go.
Terol, winner at Qatar, presumably felt that his victory hopes were best served by 'forcing' Espargaro ahead, but the plan backfired as Espargaro pulled away to claim victory by 1.811sec for Tuenti Derbi.