However , the organisers began the start sequence as usual once Piquet had regained his position .
As the cars began to overheat , several drivers turned off their engines , among them Arrows driver Riccardo Patrese , expecting another formation lap due to Piquet 's error .
The organisers began the start sequence as usual once Piquet had regained Piquet 's position .
As the cars began to overheat , several drivers turned off their engines , among them Arrows driver Riccardo Patrese , expecting another formation lap due to Piquet 's error .