At Turn 17 where Piquet crashed, normally the rear wheels of the Renault would lose grip on the exit - requiring the driver to ease off the throttle briefly. However, on the lap he crashed, Piquet kept accelerating even though the rear wheels had lost grip.
Symonds is also reported as saying: "It's true, during the Sunday meeting with Piquet the issue of deliberately causing a SC deployment came up, but it was proposed by Piquet himself. It was just a conversation."
http://www.autosport.com/news/report.php/id/78446
WTF????